1 00:00:19,185 --> 00:00:23,732 Three, two, one. Action! 2 00:00:23,940 --> 00:00:25,066 Since I was playing Thor... 3 00:00:26,484 --> 00:00:28,778 ...I've definitely ate a lot more food than I used to. 4 00:00:30,238 --> 00:00:31,558 Each meal is about 1000 calories. 5 00:00:31,698 --> 00:00:33,074 Ice cream. 6 00:00:34,409 --> 00:00:35,577 Big juicy steaks. 7 00:00:35,744 --> 00:00:37,120 Goes straight in there. 8 00:00:37,287 --> 00:00:40,915 Burgers, pad Thai, pasta, ribs. 9 00:00:41,291 --> 00:00:47,047 Sausage rolls, pizza, cake, donuts, hot dogs. 10 00:00:47,672 --> 00:00:50,341 When it comes to food, I'm like a starving hound. 11 00:00:53,219 --> 00:00:54,512 Only less picky. 12 00:00:56,056 --> 00:00:58,892 I mean, I do know that what I put into my body is important, 13 00:00:59,017 --> 00:01:02,103 but what I didn't know is that the best thing I can eat 14 00:01:02,270 --> 00:01:06,107 if I wanna live a long and healthy life is nothing. 15 00:01:06,941 --> 00:01:08,109 Absolutely nothing. 16 00:01:14,282 --> 00:01:16,493 Well, at least that's what this guy says. 17 00:01:17,619 --> 00:01:20,371 Longevity expert, Dr. Peter Attia. 18 00:01:22,415 --> 00:01:23,416 Thank you very much. 19 00:01:23,500 --> 00:01:25,580 - We'll make this our last supper. - Our last supper. 20 00:01:28,505 --> 00:01:32,008 For the next step in my quest to live longer and better, 21 00:01:32,425 --> 00:01:36,554 he wants me to go on a fast. It's basically water 22 00:01:36,638 --> 00:01:41,017 and zero calories for four days. 23 00:01:42,769 --> 00:01:45,188 Thank you... very much. 24 00:01:45,563 --> 00:01:46,815 Thank you. 25 00:01:47,607 --> 00:01:50,026 Right. 26 00:01:52,862 --> 00:01:56,449 Yeah, good thing I got to kick it off with a hearty last supper. 27 00:01:56,699 --> 00:01:58,785 Six shreds of lettuce and a carrot. 28 00:02:00,620 --> 00:02:02,247 Look, I'm gonna do it with you. 29 00:02:02,413 --> 00:02:03,498 - You are? - And... Yeah. 30 00:02:03,623 --> 00:02:05,893 It makes it a lot easier to go through this with somebody else. 31 00:02:05,917 --> 00:02:07,043 - So... - Okay, good. 32 00:02:07,127 --> 00:02:08,604 - Good, we'll suffer together. - Yeah. 33 00:02:08,628 --> 00:02:10,505 We will. 34 00:02:11,005 --> 00:02:13,174 I've definitely gone a day without food before. 35 00:02:14,884 --> 00:02:18,429 I think I get pretty cranky when... ...I've missed a meal. 36 00:02:20,431 --> 00:02:23,685 Certainly, detrimental to my happiness. 37 00:02:23,977 --> 00:02:27,313 So, it's a pretty long time, why four days? Why not... 38 00:02:27,730 --> 00:02:29,440 Why not longer? 39 00:02:29,566 --> 00:02:32,443 I mean, what is the benefit with four days? Why that number? 40 00:02:32,610 --> 00:02:37,490 Three to four days is probably that window at which we do enough 41 00:02:37,574 --> 00:02:41,744 to change how your body is interacting 42 00:02:41,828 --> 00:02:45,748 with the absence of nutrients to basically do kind of a reboot 43 00:02:45,874 --> 00:02:47,375 - on your system. - Oh, really? 44 00:02:47,792 --> 00:02:49,520 You think I'm gonna be able to hold it together? 45 00:02:49,544 --> 00:02:52,338 You reckon, in your experience, you see a lot of people, 46 00:02:52,547 --> 00:02:54,340 the first time they do it, succeed? 47 00:02:54,632 --> 00:02:56,843 In the next four days, there is no doubt in my mind, 48 00:02:56,968 --> 00:03:01,514 there will be a period of time in which you feel sluggish or... 49 00:03:01,681 --> 00:03:03,057 - Tears? - Yeah. 50 00:03:03,266 --> 00:03:05,810 - Emotional. - Kinda grumpy, grouchy, whatever. 51 00:03:06,853 --> 00:03:08,789 But, you know, if you really stop to think about it, 52 00:03:08,813 --> 00:03:11,065 this idea that we kind of live today 53 00:03:11,149 --> 00:03:14,277 where we're sort of surrounded by unlimited access to food 54 00:03:14,360 --> 00:03:17,739 and we can eat three meals and snack in between them, 55 00:03:17,906 --> 00:03:21,576 that's a relatively recent addition to our species. 56 00:03:21,701 --> 00:03:24,662 - Right. - And our ancestors would've gone days 57 00:03:24,746 --> 00:03:26,247 without food all the time, 58 00:03:26,331 --> 00:03:29,500 and not only did they have to do that, they had the ability to, 59 00:03:29,709 --> 00:03:32,253 in a period of starvation, actually go out and hunt. 60 00:03:35,632 --> 00:03:40,345 Right. I'm done. I have nothing left, except for one tiny little carrot. 61 00:03:42,388 --> 00:03:44,390 You gonna finish that last piece left of lettuce? 62 00:03:44,515 --> 00:03:46,475 Though, what about dessert? We get dessert or not? 63 00:03:46,768 --> 00:03:48,102 No. 64 00:03:49,103 --> 00:03:53,191 Starting to think, this could be the most difficult four days of my life. 65 00:03:57,570 --> 00:04:00,448 In truth, I think Chris will find this hard. 66 00:04:01,282 --> 00:04:05,119 But I've been practicing periodic fasting for many years, and in doing so, 67 00:04:05,203 --> 00:04:07,705 I've realized that the key is staying busy. 68 00:04:08,665 --> 00:04:10,750 So I've thought of an entirely appropriate challenge 69 00:04:10,875 --> 00:04:15,838 to help distract Chris from his hunger. I want him to do what his ancestors did. 70 00:04:16,381 --> 00:04:17,966 I want him to hunt for his next meal. 71 00:04:19,259 --> 00:04:23,221 But not on land. Instead, in the ocean. 72 00:04:29,769 --> 00:04:32,855 So, the plan is, that after four days without food... 73 00:04:35,400 --> 00:04:37,360 we're gonna head for the Great Barrier Reef. 74 00:04:43,074 --> 00:04:44,993 I'm gonna be armed with a lungful of air... 75 00:04:51,874 --> 00:04:53,001 and a speargun... 76 00:04:54,085 --> 00:04:56,838 I'm gonna try and dive 30 feet to the ocean floor... 77 00:04:58,423 --> 00:04:59,424 in search of a fish. 78 00:05:01,718 --> 00:05:02,958 So, there's no pressure at all. 79 00:05:10,560 --> 00:05:11,644 Thanks a lot, Pete. 80 00:05:21,654 --> 00:05:22,905 This is day one of the fast. 81 00:05:24,324 --> 00:05:27,744 I had a good sleep, I had probably seven... seven hours. 82 00:05:28,161 --> 00:05:29,245 I did dream about fasting, 83 00:05:29,329 --> 00:05:31,497 which was weird 'cause I wasn't in a fasted state. 84 00:05:31,956 --> 00:05:34,393 Fed the kids bacon and eggs this morning, that was a little tempting, 85 00:05:34,417 --> 00:05:39,088 but it's early days and I don't feel a huge threat 86 00:05:39,255 --> 00:05:42,050 at this point of breaking my four-day fast. 87 00:05:42,592 --> 00:05:44,653 I'm gonna get rid of the dog though, just in case he does... 88 00:05:44,677 --> 00:05:46,596 ...eat it. 89 00:05:46,679 --> 00:05:49,359 The dog will start to look like a roast chicken or something, right? 90 00:05:50,266 --> 00:05:53,728 Yeah, yeah. No, we wouldn't eat her, unless we really had to. 91 00:05:54,437 --> 00:05:57,982 At first, Chris will feel fine. He'll be working off the energy 92 00:05:58,066 --> 00:06:03,654 from his last meal. But once that's gone, he's gonna start to feel a lot worse. 93 00:06:04,197 --> 00:06:05,990 But I'm gonna want him to stick with this, 94 00:06:06,491 --> 00:06:10,119 because, of all the things that we can do to impact Chris's longevity, 95 00:06:10,536 --> 00:06:13,664 periodic fasting may be one of the more effective. 96 00:06:18,669 --> 00:06:20,797 My food contains glucose. 97 00:06:22,924 --> 00:06:26,094 The fuel that feeds the trillions of healthy cells in my body. 98 00:06:29,097 --> 00:06:31,682 But that glucose also feeds something else... 99 00:06:33,476 --> 00:06:34,644 zombie cells. 100 00:06:35,311 --> 00:06:39,440 Old, damaged cells that have lingered beyond their useful life. 101 00:06:40,024 --> 00:06:46,322 By spewing toxic sludge, these zombies infect other healthy cells, 102 00:06:46,906 --> 00:06:48,991 speeding up the aging process. 103 00:06:51,411 --> 00:06:53,871 Everything from hair loss and wrinkles 104 00:06:54,122 --> 00:06:57,708 to the onset of arthritis, cancer, and dementia. 105 00:06:59,794 --> 00:07:03,881 But what scientists have realized is that when we fast and cut off 106 00:07:03,965 --> 00:07:05,299 the supply of glucose, 107 00:07:05,842 --> 00:07:10,638 that zombie army is starved of energy which saps them of their power. 108 00:07:13,182 --> 00:07:15,143 It's long-term gain 109 00:07:15,226 --> 00:07:16,477 for short-term pain. 110 00:07:17,603 --> 00:07:20,940 For a food lover like me, lots of pain. 111 00:07:26,696 --> 00:07:27,697 Yeah, I'm hungry. 112 00:07:29,031 --> 00:07:30,992 We are not gonna make it. 113 00:07:31,617 --> 00:07:34,328 And by "we," I mean me and my best mates. 114 00:07:36,164 --> 00:07:40,251 If anybody can help me get through this, they can, so I'm very, very pleased 115 00:07:40,334 --> 00:07:42,837 and thankful that they've agreed to fast with me. 116 00:07:43,129 --> 00:07:45,256 We're buddies from high school... 117 00:07:45,506 --> 00:07:47,508 - Yeah. - ...primary school to Chris. 118 00:07:47,717 --> 00:07:49,302 - I'm Aaron. This is Luke. - Yep. 119 00:07:49,469 --> 00:07:50,887 And now we work for Chris. 120 00:07:50,970 --> 00:07:53,931 - So we're paid friends, really. - Yes. With benefits. 121 00:07:54,015 --> 00:07:55,993 - With benefits, and, yeah... - We're a little family. 122 00:07:56,017 --> 00:07:57,393 We're a little family. 123 00:07:57,602 --> 00:07:59,322 Having a bit of moral support could be good. 124 00:08:00,146 --> 00:08:02,166 Are you doing it all the way? Aaron, you're doing four days. 125 00:08:02,190 --> 00:08:03,232 - Yeah. - Yeah. 126 00:08:03,357 --> 00:08:04,942 - No. - No, you're gonna try. 127 00:08:05,109 --> 00:08:06,235 Yeah, I'll try. 128 00:08:09,071 --> 00:08:11,091 - He loves his food. - The angriest he's ever got at me 129 00:08:11,115 --> 00:08:12,825 was because I bought him too small... 130 00:08:12,909 --> 00:08:14,494 ...a steak once, in London. 131 00:08:14,994 --> 00:08:18,206 He almost punched me out 'cause it was like that, and he was like, 132 00:08:18,289 --> 00:08:20,517 "Look at the size of me. Why would you buy me that steak?" 133 00:08:20,541 --> 00:08:22,126 I mean, he's not gonna do four days. 134 00:08:25,338 --> 00:08:26,881 I'm cracking. 135 00:08:27,924 --> 00:08:29,842 We're days away from eating, not, like, hours. 136 00:08:30,009 --> 00:08:33,554 It's not like we can go home and smash a big bowl of spaghetti. 137 00:08:35,515 --> 00:08:41,854 Forget pasta, our next meal, with a bit of luck, is a big, juicy fish. 138 00:08:46,984 --> 00:08:49,278 But if I'm gonna be the designated fish catcher... 139 00:08:50,279 --> 00:08:52,198 I'll need some serious dive training. 140 00:08:53,908 --> 00:08:57,453 So, Peter has hooked me up with someone with a remarkable set of skills. 141 00:08:59,455 --> 00:09:03,543 I'll give you a brief demo. I'm gonna start with a really big exhale. 142 00:09:04,293 --> 00:09:06,879 Wow. 143 00:09:19,684 --> 00:09:20,977 - Huge expansion there. - Okay. 144 00:09:21,060 --> 00:09:22,353 That was incredible. 145 00:09:25,231 --> 00:09:28,734 Tanya Streeter is a breath-holding phenomenon. 146 00:09:31,195 --> 00:09:33,573 She's a ten-time free diving world champion... 147 00:09:36,450 --> 00:09:39,370 and can hold her breath for an amazing six minutes. 148 00:09:43,040 --> 00:09:47,336 What we do as average human beings, is we breathe in the top part 149 00:09:47,628 --> 00:09:50,965 of our chest, but you're not getting a lot of oxygen into your blood like that. 150 00:09:51,132 --> 00:09:53,884 There's a greater capacity in the lower part of your lungs, 151 00:09:54,176 --> 00:09:58,180 and you can't access that unless you relax your abs. 152 00:09:58,681 --> 00:10:03,311 You basically learn to stick your stomach out as you breathe in. 153 00:10:18,242 --> 00:10:21,203 - All right, how're you feeling? - Ready to set some records. 154 00:10:21,454 --> 00:10:22,622 Let's do it. 155 00:10:31,255 --> 00:10:33,215 So, is that the goal, the orange thing there? 156 00:10:33,341 --> 00:10:35,092 Sure, there and back, man. 157 00:10:35,176 --> 00:10:36,594 And what's that, about 50 meters? 158 00:10:36,719 --> 00:10:39,013 - No, that's about 100 meters. - Oh, is it? 159 00:10:39,430 --> 00:10:40,910 Be rather claustrophobic under there. 160 00:10:41,557 --> 00:10:44,226 Yeah. We've linked up a guideline, 'cause it's pretty dark, 161 00:10:44,310 --> 00:10:46,371 but it gives me an opportunity to see what you're made of, 162 00:10:46,395 --> 00:10:49,565 - mentally as well as physically. - Okay, we'll see. 163 00:10:57,448 --> 00:10:59,008 All right, whenever you're ready, Chris. 164 00:11:10,586 --> 00:11:15,883 It was really poor visibility and instantly, my lungs are burning. 165 00:11:27,520 --> 00:11:29,188 I hear in my head... 166 00:11:29,814 --> 00:11:31,816 that I should give up and I'm running out of air. 167 00:11:36,570 --> 00:11:38,989 And I'm trying to override that 'cause I know 168 00:11:39,073 --> 00:11:41,784 that there is a lot more oxygen in my lungs than you'd think. 169 00:11:47,873 --> 00:11:49,959 And surely, I must be there by now. 170 00:11:56,257 --> 00:11:58,342 - Almost halfway. - I don't think so. 171 00:11:59,969 --> 00:12:02,555 - Not even close. Twenty meters. - How many meters was that? 172 00:12:03,431 --> 00:12:04,932 I don't think you quite made it 20. 173 00:12:06,058 --> 00:12:08,686 Yeah, I'm a little disappointed. 174 00:12:08,894 --> 00:12:13,232 Turns out, I was under for a whopping 27 seconds. 175 00:12:17,361 --> 00:12:20,281 I'm actually quite surprised how ineffective and useless 176 00:12:20,448 --> 00:12:21,824 my free diving skills are. 177 00:12:22,366 --> 00:12:26,036 I know I can hold my breath on land for a few minutes, but, in the water, 178 00:12:26,162 --> 00:12:28,748 when you're kicking and using up air and energy, 179 00:12:28,831 --> 00:12:31,375 it's... it's just a whole different story. 180 00:12:33,085 --> 00:12:36,046 Diving for my dinner is gonna be harder than I thought. 181 00:12:38,799 --> 00:12:40,009 Speaking of food... 182 00:12:49,810 --> 00:12:51,228 ...I don't even like broccoli. 183 00:13:04,158 --> 00:13:05,993 And even though I've got homework to do... 184 00:13:07,119 --> 00:13:12,666 without mealtimes to punctuate the day, time just seems to drag on. 185 00:13:18,881 --> 00:13:23,636 It's, uh, almost dinnertime, and this is the worst I've felt. 186 00:13:25,221 --> 00:13:32,186 Feel pretty light-headed... ...super weak and incredibly hungry. 187 00:13:42,780 --> 00:13:45,491 I feel tired. I didn't sleep very well. 188 00:13:45,574 --> 00:13:47,451 I woke up a lot feeling really hungry 189 00:13:47,618 --> 00:13:48,661 and then, um... 190 00:13:50,162 --> 00:13:53,040 I... You know, feel empty, empty of food. 191 00:13:53,123 --> 00:13:56,919 Almost as if I'm empty of, like, energy. Feel very flat. 192 00:13:57,294 --> 00:14:00,673 Now, cooking this. I feel hungry. 193 00:14:02,675 --> 00:14:03,884 Why can't you eat? 194 00:14:04,051 --> 00:14:05,302 'Cause I'm not supposed to eat. 195 00:14:05,845 --> 00:14:07,513 For how long, Dad? 196 00:14:07,888 --> 00:14:08,931 Four days, bro. 197 00:14:09,557 --> 00:14:10,599 Why? 198 00:14:10,683 --> 00:14:15,729 I'm not even remotely tempted by this delicious, crispy bacon and eggs. 199 00:14:19,525 --> 00:14:23,737 The second day of a water-only fast is an especially difficult day. 200 00:14:24,113 --> 00:14:28,242 And the reason for this is that the body's primary reserves of glucose, 201 00:14:28,450 --> 00:14:30,327 which are kept in the liver and in the muscles, 202 00:14:30,494 --> 00:14:34,081 are starting to get rapidly depleted. And as a result of this, 203 00:14:34,164 --> 00:14:36,333 Chris is feeling really tired and groggy. 204 00:14:37,084 --> 00:14:40,212 But it's important for him to understand that this is okay, 205 00:14:40,588 --> 00:14:42,840 because there are some people who routinely do this 206 00:14:42,965 --> 00:14:46,927 and not only do they not starve, but they actually manage to thrive. 207 00:15:00,691 --> 00:15:02,651 Hey... You missed... 208 00:15:05,821 --> 00:15:06,864 Listen son, 209 00:15:06,947 --> 00:15:09,909 if you can't hit the target, 210 00:15:09,992 --> 00:15:11,118 the village won't eat. 211 00:15:12,202 --> 00:15:13,245 Try again. 212 00:15:16,332 --> 00:15:17,666 I'll try my best Dad... 213 00:15:18,292 --> 00:15:19,877 Yeah, well done. 214 00:15:20,669 --> 00:15:23,297 Isafiri is a member of the Hadza tribe. 215 00:15:28,594 --> 00:15:29,803 He's a hunter. 216 00:15:33,057 --> 00:15:34,808 We are hungry, 217 00:15:34,892 --> 00:15:36,769 and we have run out of food. 218 00:15:37,186 --> 00:15:39,063 Yeah, okay. 219 00:15:39,229 --> 00:15:40,981 I will hunt tomorrow. 220 00:15:41,273 --> 00:15:45,069 I will catch something big. 221 00:15:48,280 --> 00:15:53,077 Being hungry is part of life here. 222 00:15:53,994 --> 00:15:55,274 Sometimes we don't eat for days. 223 00:15:56,413 --> 00:15:57,748 But we are not afraid. 224 00:15:58,540 --> 00:16:01,126 Because I know we won't starve. 225 00:16:04,922 --> 00:16:06,548 Look, we should hunt there... 226 00:16:07,299 --> 00:16:09,593 Come around from the side. 227 00:16:14,556 --> 00:16:15,808 Being hungry... 228 00:16:18,268 --> 00:16:19,603 makes me a better hunter. 229 00:16:24,692 --> 00:16:28,070 Even after days without food, people like the Hadza 230 00:16:28,153 --> 00:16:30,572 are still able to find the energy to hunt... 231 00:16:31,699 --> 00:16:33,784 Look, dik-dik antelop e has taken a poop. 232 00:16:34,284 --> 00:16:35,953 ...because when a person fasts, 233 00:16:36,704 --> 00:16:37,997 when you stop eating... 234 00:16:38,205 --> 00:16:41,417 I think he is close by. 235 00:16:42,084 --> 00:16:44,628 ...it reveals the body's superpower. 236 00:16:46,171 --> 00:16:49,425 When food is plentiful, our body stores excess energy 237 00:16:49,508 --> 00:16:53,512 in the form of fat under the skin and around the internal organs. 238 00:16:54,972 --> 00:16:56,348 When food is scarce... 239 00:16:59,226 --> 00:17:00,978 that fat is sent to the liver... 240 00:17:05,649 --> 00:17:09,361 where it's turned into an alternative fuel source called a ketone. 241 00:17:09,778 --> 00:17:13,699 And it's these ketones which provide the emergency power source. 242 00:17:13,866 --> 00:17:17,995 Not only for our bodies, but also our brains. 243 00:17:24,585 --> 00:17:26,253 Along with an energy boost, 244 00:17:26,420 --> 00:17:29,548 it seems ketones also sharpen mental focus. 245 00:17:32,092 --> 00:17:35,554 Heightening the ability to see, hear... 246 00:17:37,139 --> 00:17:39,183 and sense things in the environment... 247 00:17:42,269 --> 00:17:44,396 that we normally wouldn't be able to perceive. 248 00:17:46,899 --> 00:17:49,151 And ketone production ramps up... 249 00:17:51,820 --> 00:17:54,698 just when a hunter needs it most. 250 00:17:56,366 --> 00:17:57,785 The dik-dik is in there... 251 00:18:01,455 --> 00:18:03,123 When you're getting closer, 252 00:18:05,209 --> 00:18:08,670 your mind becomes alert to the wild. 253 00:18:10,422 --> 00:18:12,549 The animal is your only goal. 254 00:18:37,032 --> 00:18:38,534 Yes. It's a dik-dik. 255 00:18:39,201 --> 00:18:40,744 We got it, we got it! 256 00:18:51,797 --> 00:18:53,757 Everyone is happy. 257 00:18:55,092 --> 00:18:56,385 When I bring home meat. 258 00:19:00,806 --> 00:19:02,307 Our children 259 00:19:04,101 --> 00:19:05,519 and our wives are happy. 260 00:19:05,769 --> 00:19:06,979 Everyone is happy. 261 00:19:09,606 --> 00:19:12,276 Ketones help the Hadza hunt when food is scarce. 262 00:19:14,695 --> 00:19:17,698 And I'm pretty sure I'm gonna need some ketones of my own 263 00:19:18,031 --> 00:19:20,409 if I'm gonna catch a fish in two days' time. 264 00:19:23,537 --> 00:19:24,830 Little prick here. 265 00:19:32,296 --> 00:19:33,505 Didn't hurt that much. 266 00:19:35,048 --> 00:19:37,634 So, I'm checking ketones on two different meters. 267 00:19:38,844 --> 00:19:41,096 They're in pretty good agreement at about one, 268 00:19:41,430 --> 00:19:43,140 and over time, this will go up. 269 00:19:43,432 --> 00:19:45,285 - There's more of them in my system now? - Yeah. 270 00:19:45,309 --> 00:19:46,435 Or I'm producing more? 271 00:19:46,560 --> 00:19:49,104 Exactly. Actually, around ten times more. 272 00:19:50,522 --> 00:19:52,274 - And that's pretty low. - Right. 273 00:19:52,649 --> 00:19:56,570 But hopefully today, tomorrow is when we'll start to see that transition 274 00:19:56,737 --> 00:19:58,131 - where once you get over... - Yeah. 275 00:19:58,155 --> 00:20:00,449 ...two and into three, that's when you start 276 00:20:00,532 --> 00:20:03,219 to kinda feel, like you're in the Matrix a little bit. You kinda seeing things 277 00:20:03,243 --> 00:20:04,523 - a little bit different. - Yeah. 278 00:20:04,912 --> 00:20:06,192 And what about the zombie cells? 279 00:20:06,246 --> 00:20:08,832 Do you think my body's getting rid of them at the moment? 280 00:20:08,999 --> 00:20:10,727 You're in the process of starting that, yeah. 281 00:20:10,751 --> 00:20:12,729 - I... I think that comes in hand... - Good to know. 282 00:20:12,753 --> 00:20:15,422 ...with this transition to, uh, ketones, 283 00:20:15,672 --> 00:20:19,301 and so, as the body starts sort of adapting to what's going on... 284 00:20:19,384 --> 00:20:21,011 ...it's gonna start to reprioritize 285 00:20:21,094 --> 00:20:23,597 and hopefully, it's knocking those guys out. 286 00:20:23,847 --> 00:20:24,890 Good. 287 00:20:27,851 --> 00:20:29,686 So, the war on zombies has begun... 288 00:20:30,687 --> 00:20:32,481 but no ketone boost yet. 289 00:20:33,941 --> 00:20:38,153 Which is a little worrying 'cause I'm off for more dive training. 290 00:20:38,445 --> 00:20:40,572 Can't say I'm swimming in energy. 291 00:20:40,822 --> 00:20:43,242 I'm... My ability to speak is... 292 00:20:43,408 --> 00:20:46,703 ...rapidly declining. How do you guys feel? 293 00:20:47,287 --> 00:20:49,998 Yeah, it's kinda peaks and troughs, isn't it? 294 00:20:50,082 --> 00:20:52,268 - It is a definite a roller coaster. - It's like... It's a real... 295 00:20:52,292 --> 00:20:54,127 It's a roller coaster of emotions. Uh-huh. 296 00:20:54,253 --> 00:20:55,921 At the moment, I'm up, but there will be 297 00:20:56,004 --> 00:20:57,756 a time tonight when I'm down. 298 00:21:06,390 --> 00:21:09,268 So, another Peter and Tanya training gig. 299 00:21:11,270 --> 00:21:13,522 This time, underwater hockey. 300 00:21:21,989 --> 00:21:23,991 They say it's gonna help me catch a fish. 301 00:21:24,908 --> 00:21:26,702 - Hey, guys. - Hey, how's it going? 302 00:21:27,160 --> 00:21:30,289 They also think, maybe it'll help keep my mind off the fast. 303 00:21:33,292 --> 00:21:34,876 Well, it ain't working. 304 00:21:36,295 --> 00:21:39,172 What else would you wanna do when you're fasting, tired, and starving? 305 00:21:39,464 --> 00:21:40,924 Learn a new sport. 306 00:21:41,591 --> 00:21:45,679 And nothing against underwater hockey, it's cool, but right now, 307 00:21:45,971 --> 00:21:47,139 I just wanna eat. 308 00:21:56,148 --> 00:21:58,442 Now, it's rough down there, but it's actually really good 309 00:21:58,525 --> 00:22:00,962 for spearfishing. There's this sudden burst of energy, there's... 310 00:22:00,986 --> 00:22:02,321 - Yeah. - You know, you don't know 311 00:22:02,404 --> 00:22:05,049 when you're gonna have to dive, so you have to be super, super efficient. 312 00:22:05,073 --> 00:22:06,116 - Oh, okay. - Okay? 313 00:22:06,199 --> 00:22:07,534 Yeah. 314 00:22:07,701 --> 00:22:09,077 Peter's playing for the reds. 315 00:22:12,122 --> 00:22:14,249 Me for the blues. Number seven. 316 00:22:16,251 --> 00:22:19,338 And my co-fasting best buddies, cheerleaders. 317 00:22:25,177 --> 00:22:28,180 I feel like I'm watching my son go off to battle or something. I'm nervous. 318 00:22:28,263 --> 00:22:29,991 - I'm real anxious. - I'm just worried about... 319 00:22:30,015 --> 00:22:31,576 I'm worried about that because without that... 320 00:22:31,600 --> 00:22:33,810 - We don't have a job. - ...we don't have a job, so... 321 00:22:33,894 --> 00:22:35,580 - We can't really... - Look after his face, please. 322 00:22:35,604 --> 00:22:36,764 Don't touch his face, please. 323 00:22:43,945 --> 00:22:45,364 Things don't start so well. 324 00:22:46,865 --> 00:22:50,202 He's taking a beating. 325 00:22:51,119 --> 00:22:52,788 Now, holding your breath is one thing... 326 00:22:53,163 --> 00:22:57,876 but doing it while being pushed and shoved, and thrown around, and so on, 327 00:22:57,959 --> 00:22:59,252 it's just a whole other thing. 328 00:23:00,003 --> 00:23:01,088 It's pretty intense. 329 00:23:06,927 --> 00:23:08,845 My need for air is overpowering. 330 00:23:16,853 --> 00:23:19,689 If that puck was a fish, I wouldn't get anywhere near it. 331 00:23:28,490 --> 00:23:30,534 Well done, Peter. 332 00:23:31,159 --> 00:23:32,244 Good goal. 333 00:23:35,831 --> 00:23:39,000 Half time, and it couldn't have come quick enough. 334 00:23:43,422 --> 00:23:45,173 - How are you doing? - It's exhausting. 335 00:23:45,340 --> 00:23:47,384 - I know. - Just trying to work out, 336 00:23:47,551 --> 00:23:50,351 you know, when to conserve your energy, and when to dive, and make sure 337 00:23:50,387 --> 00:23:52,615 you dive when the puck's coming as opposed to waiting under there 338 00:23:52,639 --> 00:23:54,700 - and then by the time it gets there... - Yeah. Yeah. No, no! 339 00:23:54,724 --> 00:23:57,036 - ...you've got nothing left. It's like... - Yeah. No waiting. 340 00:23:57,060 --> 00:23:58,496 But you got all the oxygen you need, 341 00:23:58,520 --> 00:24:00,123 - so it's mental. Your stamina becomes... - Yeah. 342 00:24:00,147 --> 00:24:01,387 ...really mental at this point. 343 00:24:01,481 --> 00:24:02,774 Sure. Yeah. 344 00:24:02,858 --> 00:24:05,652 Okay? So, just try to take some long, slow, deep breaths. So... 345 00:24:05,819 --> 00:24:09,197 Through your mouth. 346 00:24:13,702 --> 00:24:15,203 - Do you feel better? - I feel good. 347 00:24:15,495 --> 00:24:16,746 Okay, good. 348 00:24:18,874 --> 00:24:20,459 Okay. 349 00:24:33,096 --> 00:24:34,848 I don't know if it's the half time coaching 350 00:24:34,973 --> 00:24:36,266 or something else... 351 00:24:37,934 --> 00:24:40,312 but I feel a little different. 352 00:24:45,984 --> 00:24:47,652 My need for air is less urgent. 353 00:24:51,281 --> 00:24:52,824 I feel more efficient in the water. 354 00:24:55,285 --> 00:24:57,579 More aware of the other players around me. 355 00:24:59,372 --> 00:25:00,999 And I'm focused on the puck. 356 00:25:06,463 --> 00:25:09,758 And I feel a slight surge of energy. 357 00:25:11,468 --> 00:25:12,677 Just enough... 358 00:25:15,138 --> 00:25:16,306 to score. 359 00:25:35,116 --> 00:25:37,410 - How do you feel? - I feel all right now. 360 00:25:37,494 --> 00:25:39,079 - Yeah. - I feel much better than I did 361 00:25:39,246 --> 00:25:40,455 - prior to playing. - Me, too. 362 00:25:40,580 --> 00:25:41,623 Yeah. Why is that? 363 00:25:41,998 --> 00:25:43,976 I think we're probably making more ketones at the moment, 364 00:25:44,000 --> 00:25:45,603 our bodies are trying to ramp up production. 365 00:25:45,627 --> 00:25:47,730 - It's basically saying... - It thinks... thinks we're hunting.. 366 00:25:47,754 --> 00:25:48,954 - Exactly, it's like... - Yeah. 367 00:25:49,047 --> 00:25:51,359 ..."Hey, they're... they're hunting. They're getting us food." Um... 368 00:25:51,383 --> 00:25:53,069 I wouldn't be surprised if in an hour or two, 369 00:25:53,093 --> 00:25:54,553 - we feel a little worse. - Yeah. 370 00:25:54,970 --> 00:25:56,850 'Cause it'll realize, "We haven't got the food." 371 00:25:56,930 --> 00:25:58,473 "We've been kinda let down," 372 00:25:58,557 --> 00:26:00,243 and... and then, sort of, that production level 373 00:26:00,267 --> 00:26:01,726 will come down a bit. 374 00:26:07,065 --> 00:26:08,733 That doesn't help though, does it? 375 00:26:09,276 --> 00:26:10,819 Oh, for heaven's sakes. 376 00:26:12,237 --> 00:26:14,573 Just as I was beginning to feel a bit better... 377 00:26:14,739 --> 00:26:16,157 They're doing it on purpose. 378 00:26:16,241 --> 00:26:18,159 A familiar feeling returns. 379 00:26:18,785 --> 00:26:21,246 See, now I'm hungry again. 380 00:26:21,329 --> 00:26:23,331 Still, at least my best mates are fasting with me. 381 00:26:24,457 --> 00:26:25,709 And they never let me down. 382 00:26:39,931 --> 00:26:41,975 - Hey, Chris! - Hey! 383 00:26:43,268 --> 00:26:44,269 What the... 384 00:26:44,477 --> 00:26:47,314 Sorry, mate, we couldn't do it. This is so good. 385 00:26:47,731 --> 00:26:48,857 Are you. 386 00:26:49,733 --> 00:26:51,109 Come and have a slice, mate. 387 00:26:51,276 --> 00:26:54,112 Two minutes ago, I was like, "It really helps the guys 388 00:26:54,279 --> 00:26:56,406 "are doing it with me, you know, 'cause I'm like... 389 00:26:56,656 --> 00:26:58,718 "I'm like feeling sluggish." I'm like, "Oh, I feel bad." 390 00:26:58,742 --> 00:27:00,678 But then I'm like, "Oh, actually, they're laughing..." 391 00:27:00,702 --> 00:27:02,203 "...and I gotta keep it up." 392 00:27:02,287 --> 00:27:05,207 You know, "We're all in this tog... together." That was three minutes ago. 393 00:27:05,749 --> 00:27:07,310 And I'd love to tell you it's not that good, 394 00:27:07,334 --> 00:27:09,127 but it's honestly the best thing ever. 395 00:27:09,961 --> 00:27:12,023 - What, I thought you were fasting? - That's what I said. 396 00:27:12,047 --> 00:27:14,734 Both of them were fasting. I said to them, like, I... like, I... like, I... 397 00:27:14,758 --> 00:27:15,925 Just have a smell of that. 398 00:27:16,635 --> 00:27:18,970 - Cool. - I gotta say, I really thought 399 00:27:19,054 --> 00:27:20,138 you were gonna hang tough. 400 00:27:20,221 --> 00:27:23,433 I was gonna, but then this is the best milkshake I've ever had. 401 00:27:23,642 --> 00:27:25,560 - Good luck finding... - Oh, my God. 402 00:27:26,436 --> 00:27:28,772 I can smell the pizza. I'll just go away. I can smell it. 403 00:27:38,448 --> 00:27:42,327 Great, my best buddies have bailed, and just as Peter predicted, 404 00:27:42,410 --> 00:27:47,207 the ketone pick-me-up has gone, and I feel terrible. 405 00:27:47,457 --> 00:27:50,669 Okay, so this is, uh, day three. 406 00:27:51,127 --> 00:27:54,172 Feeling pretty weak. Didn't sleep very much last night. 407 00:27:54,255 --> 00:27:55,983 I feel like my sleep's getting worse and worse. 408 00:27:56,007 --> 00:27:58,718 You know, last night was really hard, giving the kids dinner. 409 00:27:58,802 --> 00:28:05,350 They had, um, delicious, like, roast lamb, and vegetables, and... and fruit, and... 410 00:28:06,184 --> 00:28:08,311 and I saw a chocolate brownie in there somewhere. 411 00:28:09,104 --> 00:28:13,817 Multiple occasions, I... I... I... I thought about just ripping that food 412 00:28:13,900 --> 00:28:16,653 straight out of their hands. Feel pretty weak trying to walk up 413 00:28:16,820 --> 00:28:21,032 the stairs, trying to walk down the hall, I feel like it's tough to catch my breath. 414 00:28:21,116 --> 00:28:25,370 Uh, but, you know, day three, and, um... 415 00:28:26,830 --> 00:28:28,623 I guess we're almost there. It's only... 416 00:28:30,041 --> 00:28:36,256 12, 48, I don't know, I can't even think. Like, I... Don't know. 417 00:28:38,717 --> 00:28:40,301 I'm losing it. 418 00:28:54,899 --> 00:28:59,279 I'm trying to get my ketones going again by working out, but I'm feeling nothing. 419 00:29:09,080 --> 00:29:13,168 Oh, and did I mention that I'm feeling really, really hungry? Hmm? 420 00:29:18,047 --> 00:29:21,551 I don't think Chris has found this to be a pleasant experience at all. 421 00:29:22,260 --> 00:29:23,803 But a big part of fasting... 422 00:29:23,887 --> 00:29:25,930 ...is understanding why you're doing it. 423 00:29:26,473 --> 00:29:28,808 And that's the key to tolerating this thing. 424 00:29:29,100 --> 00:29:32,687 It's being able to focus on the motivation behind the fast. 425 00:29:33,897 --> 00:29:36,441 One of the benefits is, you have a family. 426 00:29:36,524 --> 00:29:38,276 - Yeah. - And you can sort of see 427 00:29:38,401 --> 00:29:42,405 how much you enjoy that, and that's kind of the anchor, 428 00:29:42,572 --> 00:29:43,948 - I think, um... - Yeah. 429 00:29:44,324 --> 00:29:48,161 You can actually look into the eyes of the people for whom it matters 430 00:29:48,244 --> 00:29:49,370 the most to you. 431 00:29:49,579 --> 00:29:52,457 Yeah, sure. I like that motivation, you know? 432 00:29:52,624 --> 00:29:54,226 Anything that stops me thinking about food 433 00:29:54,250 --> 00:29:57,545 is sort of a... a good thing at this point, so... 434 00:29:59,339 --> 00:30:06,054 Asking Chris for his very first fast to go as long as four days is a big ask. 435 00:30:13,561 --> 00:30:15,814 But I really need him to continue now. 436 00:30:18,024 --> 00:30:21,152 Because once a human goes three days without food, 437 00:30:21,694 --> 00:30:26,199 we think some remarkable biochemical changes take place 438 00:30:26,825 --> 00:30:29,410 that have significant longevity benefits. 439 00:30:33,498 --> 00:30:36,584 Remember those toxic zombie cells aging my body? 440 00:30:37,001 --> 00:30:39,754 Well, they're not the only things getting dealt with. 441 00:30:40,380 --> 00:30:43,675 Even inside my healthy cells, there's wear and tear. 442 00:30:44,509 --> 00:30:47,303 But scientists think that without food to process, 443 00:30:47,554 --> 00:30:50,265 those cells can switch into repair mode, 444 00:30:50,849 --> 00:30:55,603 fixing damage, cleaning up garbage, nipping any problems in the bud. 445 00:30:58,606 --> 00:31:01,901 With the zombies in check and the rest of me in tip-top condition... 446 00:31:03,027 --> 00:31:06,990 the future looks healthier and also longer. 447 00:31:08,116 --> 00:31:10,827 Science is only just beginning to understand 448 00:31:10,910 --> 00:31:13,037 the longevity benefits of fasting. 449 00:31:14,247 --> 00:31:17,458 In fact, we're just catching up with the cultures and religions 450 00:31:17,542 --> 00:31:21,629 that have placed fasting at the center of their practice for millennia. 451 00:31:29,596 --> 00:31:31,639 Today is a beautiful day. 452 00:31:34,767 --> 00:31:37,395 Retired teacher Todesso and his family 453 00:31:37,520 --> 00:31:40,273 are celebrating Easter with a walk to church. 454 00:31:42,692 --> 00:31:45,737 Papa, are we nearly there yet? 455 00:31:47,030 --> 00:31:48,364 No, not yet. 456 00:31:49,240 --> 00:31:51,868 But the church is three days away 457 00:31:52,744 --> 00:31:54,412 in the holy city of Gondar. 458 00:31:56,623 --> 00:31:57,916 Are you tired? 459 00:31:57,999 --> 00:31:59,334 Yes I'm tired. 460 00:31:59,417 --> 00:32:02,211 Don't be tired, be strong. 461 00:32:03,922 --> 00:32:05,715 During their grueling pilgrimage, 462 00:32:05,840 --> 00:32:08,092 the family eat absolutely nothing. 463 00:32:09,719 --> 00:32:13,181 Fasting is very important to us, 464 00:32:13,681 --> 00:32:16,935 it is a tradition handed down by our ancestors. 465 00:32:17,518 --> 00:32:18,811 We fast to be closer to God. 466 00:32:20,229 --> 00:32:21,272 Come on you two. 467 00:32:21,356 --> 00:32:23,024 I'll be so happy when we get there. 468 00:32:24,651 --> 00:32:26,444 I got you. 469 00:32:27,654 --> 00:32:30,823 And joining her parents for the first time is daughter Helen. 470 00:32:31,407 --> 00:32:35,328 The first day was the hardest. 471 00:32:36,329 --> 00:32:38,206 I felt so weak. 472 00:32:43,628 --> 00:32:47,465 My brain was telling me, "You can do this." 473 00:32:48,049 --> 00:32:51,552 But my stomach was saying, "Bring me food!" 474 00:32:52,845 --> 00:32:55,640 But fasting isn't just bringing them closer to God... 475 00:32:56,724 --> 00:32:59,143 they believe it's bringing them health benefits. 476 00:33:00,812 --> 00:33:04,399 Although my father is 75 years old, he is very strong. 477 00:33:05,191 --> 00:33:07,110 I have never seen him sick. 478 00:33:08,194 --> 00:33:11,698 He swears fasting is why. 479 00:33:16,119 --> 00:33:19,122 I started fasting when I was seven. 480 00:33:19,956 --> 00:33:22,083 And I've been doing it for 68 years. 481 00:33:24,043 --> 00:33:27,005 It keeps me feeling healthy. 482 00:33:31,592 --> 00:33:37,598 I have never been affected by a common cold, 483 00:33:38,391 --> 00:33:41,853 or any other disease. 484 00:33:43,354 --> 00:33:45,440 Look, Gondar is just over the mountain. 485 00:33:45,606 --> 00:33:46,816 HELEN I can see it... 486 00:33:46,899 --> 00:33:48,067 Come on. 487 00:33:52,196 --> 00:33:53,239 I can smell incense. 488 00:33:59,746 --> 00:34:01,247 Easter isn't the only time 489 00:34:01,330 --> 00:34:03,374 Ethiopian Orthodox Christians fast. 490 00:34:04,709 --> 00:34:09,672 In fact, they observe up to 250 fasting days a year, 491 00:34:10,006 --> 00:34:13,593 during which they vary their practice, sometimes eating nothing, 492 00:34:13,885 --> 00:34:17,221 and others, restricting how much or when they eat. 493 00:34:18,514 --> 00:34:20,892 All these smells So much food. 494 00:34:22,101 --> 00:34:24,062 Gondar is an amazing place. 495 00:34:26,939 --> 00:34:29,192 There are many ways to go about fasting. 496 00:34:29,609 --> 00:34:31,277 There are countless protocols. 497 00:34:31,778 --> 00:34:34,655 But remember, they all have one thing in common. 498 00:34:35,031 --> 00:34:37,992 They reduce the number of calories we consume. 499 00:34:38,493 --> 00:34:42,246 And in a world where so many of us are over-nourished, 500 00:34:42,663 --> 00:34:47,126 this is an essential part of how we can go about living a longer, 501 00:34:47,418 --> 00:34:49,796 healthier life. 502 00:34:53,758 --> 00:34:58,679 I am very proud of myself for doing the fast. 503 00:35:00,890 --> 00:35:02,725 I will do it every year. 504 00:35:04,352 --> 00:35:07,730 I will only stop fasting on the day I die. 505 00:35:17,949 --> 00:35:20,326 Two hundred and fifty fasting days a year. 506 00:35:23,079 --> 00:35:25,915 Makes me think, "Surely, I can go another 24 hours... 507 00:35:27,667 --> 00:35:29,168 "can't I?" 508 00:35:30,294 --> 00:35:33,089 Struggling, struggling I'm struggling. 509 00:35:36,425 --> 00:35:39,262 I'm on the ferry to our dive base in the Great Barrier Reef... 510 00:35:43,266 --> 00:35:45,768 ...and I could really do with a ketone pick-me-up. 511 00:35:49,772 --> 00:35:53,568 I had a little, like... 512 00:35:53,651 --> 00:35:55,337 ...like an hour ago, a little burst of energy. 513 00:35:55,361 --> 00:35:58,656 I thought, "Oh, this is good." Now... 514 00:36:21,095 --> 00:36:22,263 So, this is it. 515 00:36:22,722 --> 00:36:26,559 The last day of the fast, and the day I'm supposed to catch dinner 516 00:36:26,642 --> 00:36:30,271 for me and Peter. What could possibly go wrong? 517 00:36:30,980 --> 00:36:32,607 So, how are you feeling this morning? 518 00:36:32,732 --> 00:36:35,318 Uh, pretty weak. Pretty... Pretty low energy. 519 00:36:35,443 --> 00:36:37,195 I feel like I've just rolled out of bed. 520 00:36:37,320 --> 00:36:41,073 You know, even though you don't feel it, at the microscopic level, 521 00:36:41,157 --> 00:36:43,326 inside your body, there's a war going on. 522 00:36:43,492 --> 00:36:45,620 And that war is being won by the good guys. 523 00:36:46,954 --> 00:36:49,165 And that's the real reason we're doing this. 524 00:36:49,332 --> 00:36:52,293 - Yeah. - All right, let's see what we got here. 525 00:36:54,545 --> 00:36:58,049 So, I could live longer, but right now, 526 00:36:58,257 --> 00:37:00,097 I'm not sure I'm gonna make it through the day. 527 00:37:03,971 --> 00:37:06,682 So, remind me, where were my ketone levels yesterday? 528 00:37:06,891 --> 00:37:09,477 So, yesterday, you were at about one. 529 00:37:12,897 --> 00:37:14,440 - Now, you're almost at two. - Yeah. 530 00:37:14,607 --> 00:37:17,568 - When the ketones get closer to three... - Yeah. 531 00:37:17,693 --> 00:37:19,362 ...is really when that switch is flipped. 532 00:37:19,487 --> 00:37:21,030 But once you get in the water... 533 00:37:21,113 --> 00:37:22,353 ...I think it's gonna shoot up. 534 00:37:23,074 --> 00:37:26,160 I don't wanna put any pressure on you, but I'm hungry, man. 535 00:37:26,619 --> 00:37:29,622 And seeing as I can't catch a fish with a spear and you can... 536 00:37:31,249 --> 00:37:33,918 I kinda need you to come through on this. The stakes are high... 537 00:37:34,043 --> 00:37:35,283 - Yeah. - ...for the both of us. 538 00:37:35,378 --> 00:37:38,714 - All I heard was "steaks." Edible kind. - Yeah. 539 00:37:42,635 --> 00:37:44,971 The stakes are high, and not just for today. 540 00:37:45,805 --> 00:37:48,057 By fasting, Peter says I'm fighting 541 00:37:48,140 --> 00:37:50,685 those zombie cells and repairing healthy ones. 542 00:37:51,644 --> 00:37:54,188 And that could mean a longer, healthier life. 543 00:37:56,148 --> 00:37:59,360 But first, I've gotta go hunt down that fish. 544 00:38:02,280 --> 00:38:04,323 - Welcome aboard. - Thank you so much. 545 00:38:06,242 --> 00:38:07,618 If only I can find the energy. 546 00:38:10,454 --> 00:38:11,956 I'd love some ketones right now. 547 00:38:15,918 --> 00:38:19,547 Chris's ketone levels have risen, which is what we wanna see. 548 00:38:20,298 --> 00:38:23,968 I know he isn't feeling it yet, but just as in the underwater hockey, 549 00:38:24,385 --> 00:38:28,306 the effort of hunting is going to ramp up these evolutionary adaptations 550 00:38:28,389 --> 00:38:31,350 in his body, giving him the edge he needs. 551 00:38:36,439 --> 00:38:38,024 Stretch your legs. 552 00:38:38,399 --> 00:38:40,159 - I know. - Just made me really light-headed. 553 00:38:46,782 --> 00:38:48,409 I'm feeling really vague... 554 00:38:50,703 --> 00:38:52,747 and kinda absent from everything. 555 00:38:54,874 --> 00:38:58,586 I was expecting this big flood of energy that he keeps talking about. 556 00:39:02,631 --> 00:39:04,133 It's not kicking in though. 557 00:39:06,927 --> 00:39:08,137 Don't overdo it. 558 00:39:08,679 --> 00:39:11,640 Blackout, or what we refer to as a loss of motor control, is... 559 00:39:11,766 --> 00:39:12,850 is very real. 560 00:39:14,060 --> 00:39:16,520 Yeah. So what are the symptoms 561 00:39:16,604 --> 00:39:20,066 that I'll feel if I need to wave the flag 562 00:39:20,149 --> 00:39:21,525 of retreat? 563 00:39:21,734 --> 00:39:27,365 Um... There's a fine line between feeling completely empty and done, 564 00:39:27,531 --> 00:39:31,243 and really feeling almost like your head is shaking 565 00:39:31,410 --> 00:39:33,496 and your hands are shaking a little bit. 566 00:39:33,704 --> 00:39:36,415 I mean, if it's a blackout, you're not gonna feel anything at all 567 00:39:36,499 --> 00:39:38,299 and you're not gonna remember anything at all. 568 00:39:38,376 --> 00:39:41,253 So if I take one look at you and your face tells me that you're done, 569 00:39:41,587 --> 00:39:44,274 doesn't matter how driven you are, you're done and we're gonna get out. 570 00:39:44,298 --> 00:39:45,549 Sure. 571 00:39:47,134 --> 00:39:49,614 Let me know how you're feeling and just don't push it too hard. 572 00:39:49,929 --> 00:39:51,055 - I'm hungry. - I know. 573 00:40:10,074 --> 00:40:11,117 I'm exhausted already. 574 00:40:12,993 --> 00:40:14,161 All right, it's go time. 575 00:40:23,629 --> 00:40:25,047 Right, I'm in. 576 00:40:46,777 --> 00:40:48,654 I know I have enough oxygen in my body... 577 00:40:50,990 --> 00:40:55,494 but I look up and the boat seems so, so far away. 578 00:40:57,663 --> 00:40:59,540 I feel like I'm losing all focus... 579 00:41:00,833 --> 00:41:03,586 and suddenly the urge to breathe is overwhelming. 580 00:41:09,884 --> 00:41:10,968 How do you feel? 581 00:41:12,303 --> 00:41:13,983 Yeah, I just went down there and then went, 582 00:41:14,013 --> 00:41:15,723 "Oh, I need to breathe soon," 583 00:41:15,806 --> 00:41:17,367 and then I felt really weak, and I thought, 584 00:41:17,391 --> 00:41:19,231 - "There's no way I can do this, ever." - Yeah. 585 00:41:21,103 --> 00:41:25,608 I'm feeling so tired. And the energy boost that Peter promised me... 586 00:41:26,692 --> 00:41:27,776 nothing. 587 00:41:31,530 --> 00:41:34,200 So after a brief moment, I go again. 588 00:41:48,714 --> 00:41:51,592 But this time, I start to feel a little different. 589 00:41:54,094 --> 00:41:56,847 As I'm going down, it's like I'm tuning into the ocean. 590 00:41:59,266 --> 00:42:00,476 I can hear every sound. 591 00:42:03,562 --> 00:42:05,189 Time seems to slow down. 592 00:42:10,653 --> 00:42:12,613 And I start to feel a surge of energy. 593 00:42:17,243 --> 00:42:19,954 And then, I see a fish. 594 00:42:40,224 --> 00:42:43,394 - Nice work. You did it. - Got one. Peter... 595 00:42:43,769 --> 00:42:45,771 ...your dinner. 596 00:42:45,938 --> 00:42:48,274 Hey, nice one. 597 00:42:49,817 --> 00:42:52,444 Awesome job, man. 598 00:42:52,653 --> 00:42:53,904 He looked great. 599 00:42:55,072 --> 00:42:56,240 You looked great. 600 00:43:02,580 --> 00:43:05,583 We did another test after the hunt, and the surge of energy, 601 00:43:05,916 --> 00:43:08,877 turns out my ketones had shot up to nearly three. 602 00:43:09,628 --> 00:43:12,673 So it worked. The science came good. 603 00:43:24,351 --> 00:43:25,769 Not a bad catch, huh? 604 00:43:25,978 --> 00:43:27,187 It's an amazing catch, man. 605 00:43:27,980 --> 00:43:29,398 It smells good, looks good. 606 00:43:29,732 --> 00:43:32,484 But, you know, I'd have been happy eating vegetables right now 607 00:43:32,568 --> 00:43:34,236 - if that's all we had. - I know. 608 00:43:35,404 --> 00:43:36,405 Boom! 609 00:43:36,488 --> 00:43:39,992 There's all this anticipation and buildup, it almost felt guilty 610 00:43:40,117 --> 00:43:43,287 or like I was doing something wrong if I was gonna take that first bite. 611 00:43:46,707 --> 00:43:49,627 This will be the nicest "break-fast" I've ever had, I think. 612 00:43:52,546 --> 00:43:54,882 - So who eats first? - The man who caught the fish. 613 00:43:56,175 --> 00:43:58,761 We didn't dive into it like we'd expected. 614 00:44:00,220 --> 00:44:01,221 It's unreal. 615 00:44:05,059 --> 00:44:07,353 Ceremonial and... 616 00:44:08,395 --> 00:44:09,563 and important and special. 617 00:44:24,161 --> 00:44:26,455 Don't know whether to laugh or cry. 618 00:44:27,247 --> 00:44:30,501 That was the best meal I've ever had, I think. 619 00:44:32,961 --> 00:44:35,506 Sometimes when I'm eating that first meal after a fast, 620 00:44:35,589 --> 00:44:38,759 I have this tiny, tiny piece of regret. 621 00:44:39,009 --> 00:44:41,428 And I think, "Should I have gone another day?" 622 00:44:41,637 --> 00:44:42,763 Do you feel any of that? 623 00:44:44,098 --> 00:44:47,685 - Not a teeny, tiny piece. - Not that much of it? 624 00:44:47,851 --> 00:44:48,852 - Nothing. No. - No. 625 00:44:48,977 --> 00:44:51,438 Absolutely not. 626 00:44:53,440 --> 00:44:56,610 No, right now, mate, I'm in the middle of heaven. 627 00:45:01,699 --> 00:45:03,325 Oh! It's amazing. 628 00:45:06,495 --> 00:45:08,914 Well, I'd like to make a toast... 629 00:45:10,416 --> 00:45:12,876 to the ocean, for feeding us this fish... 630 00:45:13,752 --> 00:45:17,172 and you, for making me suffer through four days of fasting 631 00:45:17,256 --> 00:45:18,716 to really, really appreciate it. 632 00:45:19,299 --> 00:45:23,011 I'll make a toast to your 90-year-old self and those great-grandchildren 633 00:45:23,095 --> 00:45:25,347 - you're gonna be playing with. - Cheers. 634 00:45:33,856 --> 00:45:39,361 So, that's it, four days, no food. Didn't crack. Would I do it again? 635 00:45:39,778 --> 00:45:43,073 Can't believe I'm saying this, but yes. 636 00:45:43,741 --> 00:45:46,452 From now on, I do want fasting to be a part of my life. 637 00:45:46,660 --> 00:45:50,330 Oh, oh. Look at us going at it. Yeah! 638 00:45:50,748 --> 00:45:53,876 That's not to say I'm never gonna go out with a bunch of friends. 639 00:45:54,001 --> 00:45:56,462 It's so hot. 640 00:45:56,670 --> 00:46:01,717 Basically eat everything on the menu, like a starving hound. 641 00:46:02,551 --> 00:46:04,303 It's so hot! 642 00:46:04,470 --> 00:46:05,804 I'll definitely do that. 643 00:46:52,726 --> 00:46:55,479 I'm just looking at it. I'm just looking. I'm not eating anything.