In short
David Sinclair discusses slowing aging by embracing controlled discomfort (hormesis), including cold exposure, exercise, and especially calorie restriction/fasting. He argues modern comfort (constant food, avoiding cold, less exercise) accelerates aging, and that increasing stressors within safe limits can slow the aging rate.
Guest backgrounds
David Sinclair is a longevity researcher running lab studies on mice; Lewis Howes hosts the Daily Motivation Show.
Key claims
Controlled discomfort slows aging “dramatically”; fasting/calorie restriction can extend lifespan in animals; three-day fasting may trigger autophagy (“super cleansing”); there’s no one-size-fits-all fasting protocol.
Notable examples
Mouse studies comparing ad libitum feeding vs calorie restriction (lean mice on restriction stay active, show less gray hair, and age more slowly); discussion of skipping breakfast/lunch, a 24-hour fast monthly, and three-day fasts for deep autophagy.
Written by AI. May contain mistakes. Listen to the episode to check what was said.
Chapters
Tap a time to open that second in VOThe Importance of Discomfort
0:45 to 2:14
Discover how embracing discomfort can slow down aging.
“like that feeling of adversity, going in cold, working out hard, doing something where it's a, you're not going to kill yourself or hurt or break a leg, but it's like discomfort.”
Caloric Restriction and Aging
2:14 to 3:26
Learn about the effects of diet on aging through caloric restriction.
“Skip a meal or two a day as much as you can.”
Fasting Methods and Their Benefits
3:26 to 6:02
Explore different fasting methods and their impacts on health.
“What do you think is ideal for most people?”
Fasting Methods and Their Benefits
6:15 to 6:31
Explore different fasting methods and their impacts on health.
“And if you're looking to create more financial freedom in your life, you want abundance in your life and you want to stop making money hard in your life, but you want to make it easier.”
Transcript
Automatic transcript. May contain errors.0:00Lewis Howes:Hey, Chicagoland, the Wayfair store is in your neighborhood at Edens Plaza and Wilmette. Finally, you can feel the fabric, sit on the sectionals, and even open the refrigerators. Plus, our in-store designers will help you bring it all together with free one-on-one design support for any project on any budget. Yep, we said free. Oh, and did we mention the cafe? So what are you waiting for? Come see all that's in store. Visit the Wayfair store today at Edens Plaza and Wilmette. Wayfair, every style, every home. Hi, my name is Lewis Howes and welcome to the Daily Motivation Show.
0:41Lewis Howes:Controlled pain, right? Going in a sauna for 15 minutes and pushing an extra minute, like that feeling of adversity, going in cold, working out hard, doing something where it's a, you're not going to kill yourself or hurt or break a leg, but it's like discomfort. Is that what I'm hearing? That's the most important lesson. We call it hormesis. It's basically your body will be complacent if you don't tell it to work hard. And the problem with our society is everything is designed to be comfortable. That's what we strive for. I was coming here flying out and I'm looking at all the roller bags and I'm carrying my two bags here and I'm thinking should I put it down?
1:22No, I'm gonna walk with my bag, because that's what people used to do. But these days, everything is all about comfort. Constant food, don't exercise, don't be cold ever. It's crazy, we're killing ourselves, we're accelerating our aging process. So we gotta get out of that comfort zone. We're killing ourselves by being comfortable.
1:43Lewis Howes:Right. So is there too much, like if I'm cold therapy, and hot, and fasting, and doing a HIIT workout, is there such thing as too much discomfort in your life that will start to age you? I don't think so. So I could fast, be in the cold and the heat, two minutes of sun, like do all these things in a day, do it consistently, carry my bags everywhere, and you think it'll make me younger? I think your rate of aging will be slowed down dramatically. Wow. Skip a meal or two a day as much as you can. Yeah, I mean, there's no question in my mind that this would work. give you an extra at least 15 years maybe 25 wow it's it it's not it's not rocket science right if you do that to a rat if you give it cold or you actually give it less food um it starts to if you come to my lab you'll see mice we've got mice that are on a regular diet they can eat whenever they want food just laying around just eat as much you want and those are not fat mice because they're on a lean diet the ones we give the high fat diet they die 30 faster anyway they age rapidly but let's say even if you're lean like you are and eating well but you're eating a lot right constantly yeah if we do that to a mouse they will age at the what we call the normal rate so they'll be two years old they're getting frail they get gray hair they're looking old and then they'll die about six months later on average the mice that are on this calorie restricted diet that either get less food in total or only eat for a few hours a day they're running around the cage, no gray hair, they're super active, they stay young.
3:25Lewis Howes:So don't eat. Well, you got to eat. It's fasting. What do you like? Intermittent fast? Do you like the 24-hour fast? Do you like a three-day fast? What do you think is ideal for most people? Well, scientifically, I think going for three days is great. Scientifically. Peter Atiyah, hats off to him. That's his profession. He can do that. what's the prolong or what's the diet he's a doctor who's experimenting on his body in severe ways and three days it's like well he goes for a week without food he just drinks water wow and uh skin and bones though right yeah it's probably not the best for high performance no no if you're an athlete forget it so what if you're an athlete if you want to work out do HIIT training yeah what what do you think is scientifically right like one day fast and and intermittent fasting and skipping meals?
4:16Well, so I get asked this every day. And the simple answer is do as much as you can and the more the better in general without losing your energy. But the other fact is that nobody knows the true answer. Anyone who says this is the way to do it is BSing you. Because everyone's different
4:37Lewis Howes:and we all have different needs. Different bacteria in the gut, different energy levels, different genes, different lifestyles, different professions. And so for someone like me, I'll tell you what works for me is, so I'm often sitting probably for half the day. I've got a standing desk. That's a start. You're not working out. No. I work out once a week for a few hours. That's about it. As much as I can do. So for me, what I do is I very rarely eat breakfast. I'm not hungry in the morning anyway. I try to skip lunch with my cups of tea. I would say I'm about 70 % successful. I might have a little nibble of something in the afternoon because I can't focus well.
5:23But then I have a normal dinner. I go out to dinner and I'm living normally. That works for me and I think for an athlete, at least skipping one meal would be good.
5:33Lewis Howes:And then maybe one day a month not eating or something, right? Yeah, that sounds reasonable. Going for a whole week though. Yeah, a 24 hour fast could be good once a month. One thing though about that three day fast, I've never done it myself, but what happens, we know, is that it kicks in what's called the super cleansing autophagy pathway. Yeah, it kills the bad cells. And gets rid of the bad proteins that have accumulated. Three days. You need to go for three days to really get the deep cleanse, unfortunately. You've never done it though, huh? She don't need it, you look like you're 30. So you're fine.
6:06maybe I could be 20, you know.
6:14Lewis Howes:I have a brand new book called Make Money Easy. And if you're looking to create more financial freedom in your life, you want abundance in your life and you want to stop making money hard in your life, but you want to make it easier. You want to make it flow. You want to feel abundant. Then make sure to go to makemoneyeasybook.com right now and get yourself a copy. I really think this is gonna help you transform your relationship with money this moment moving forward. We have some big guests and content coming up. Make sure you're following and stay tuned to this episode of The Daily Motivation Show.
6:56Lewis Howes:Thank you so much for listening to today's episode of The Daily Motivation, and I hope you have an amazing rest of your day. If you enjoyed this episode, make sure to click the link in the description that will take you to the full episode of our main podcast on the School of Greatness. And if you are loving the daily motivation, please follow us over on Apple Podcasts and Spotify and leave us a review over on Apple Podcasts right now. And if you want more exclusive content and ad-free listening experience, make sure to subscribe to our Greatness Plus channel on Apple Podcasts right now. And if you want to get even more inspiration from our world-class guests and learn how to improve your life and take it to the next level, then make sure to sign up for the Greatness newsletter and get it delivered right to your inbox over at greatness.com slash newsletter.
7:46Lewis Howes:Again, have an amazing day and I'll see you tomorrow with another episode of the Daily Motivation Show.
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Check out the full episode: https://lewishowes.com/podcast/live-a-longer-life-and-reverse-aging-with-dr-david-sinclair/
David Sinclair's lab mice are not fat, and they are not aging fast either.
The Harvard longevity scientist tells Lewis comfort might be the thing quietly killing us.
Constant food. No exercise. Never getting cold. All of it speeds up how fast the body breaks down.
His research found something stunning. Calorie restriction alone can slow aging enough to add fifteen, maybe twenty five years.
Lewis has his own proof it works outside a lab. A freezing hike up a mountain, wind whistling at sixty miles an hour, hands going numb through frozen gloves.
He calls it life changing.
Turns out the mind matters as much as the body here. What gets said out loud on that climb can decide whether the body pushes forward or shuts down.
Discomfort, on purpose, might be the closest thing to a fountain of youth.
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