Q&A with Tim — The 4-Hour Workweek in a World of AI, The 4-Hour Body After 40, and More
Tim Ferriss answers listener questions on The 4-Hour Workweek in an age of AI agents, rebuilding momentum, vision training, accelerated TMS, back pain, and whether The 4-Hour Body still holds up after 40.
The gist
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Ferriss says AI multiplies whatever you feed it, so definition and elimination matter most, since over 90% of uses he's seen create more work.
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To break overthinking, Ferriss recommends tiny daily actions, like five push-ups before each meal or a daily thank-you call, to rebuild self-trust.
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Ferriss, an investor in Oryx, says using it 8 minutes a day for 30 days let him read tiny menu print in dim light.
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Ferriss stands by The 4-Hour Body, pairing slow-carb eating with a 16-hour fast and using Occam's Protocol to build muscle before back surgery.
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For new parents with little money, Ferriss suggests the Fierce Intimacy audiobook plus cheap home workouts like The Happy Body and gymnastic strength training.
Tim Ferriss recommends it
"I'll add one resource to that. Read old books that contain principles, like The Effective Executive by Peter Drucker would be one that stands out. It's very short. It is very, very tactic and principle dense, and you can update the things that are outdated very easily."
▶ Play at 5:29
Tim Ferriss recommends it
"What I have seen work is a bias towards immediate small actions. What I mean by that is, and Atomic Habits by James Clear does a good job of outlining this... starting with small actions that cumulatively, inevitably will have a larger impact."
▶ Play at 9:545 creators recommend it, including Chris Williamson, Andrew Huberman, and Mark Manson.
See all on the Atomic Habits page
Tim Ferriss uses it
"Right now, I'm using The Way with Henry Shukman. I am involved in that app. I'm a small investor, but I really like a single dedicated teacher with a logical progression of skills. And I keep them short... I do 10 minutes. I try to do it twice a day."
▶ Play at 49:32
Tim Ferriss uses it
"I used the Oryx software, and I'm an investor in this company, which only happened after I tested it, because I used it for 30 days, 8 minutes a day, and I went from not being able to really read anything at this distance to being able to read a menu with tiny font at night in..."
▶ Play at 25:05
Tim Ferriss uses it
"I'm in prep for surgery. I'm using Occam's protocol from that book to increase muscle mass with the expectation that I will have quite a bit of atrophy in 4 to 6 weeks post surgery."
▶ Play at 1:02:59
Tim Ferriss uses it
"My default, however, is actually a hybrid of those two, which is slow-carb diet with intermittent fasting, where I am fasting for at least 16 hours, and then I have an 8-hour window of eating... It is remarkable how little it takes. 4 to 6 weeks, and my tests were completely a..."
▶ Play at 1:01:2610 creators recommend it, including David Sinclair, Andrew Huberman, and Joe Rogan.
See all on the Intermittent Fasting page
Tim Ferriss uses it
"I will alternate sometimes with the ketogenic diet... for optimizing state, for stabilizing and maximizing energy production, in my particular case, I find the ketogenic intermittently to be very helpful."
▶ Play at 1:00:557 creators recommend it, including Chris Palmer, David Baszucki, and Martin Picard.
See all on the Ketogenic diet page
Tim Ferriss recommends it
"There's an audiobook called Fierce Intimacy by Terry Real. I find Terry to be a beacon of clarity in a world of hand-wavy relationship advice... And I have found that incredibly useful... if you had to pick one, I'd say listen to Fierce Intimacy."
▶ Play at 1:05:54
Tim Ferriss recommends it
"They have a book and a program called The Happy Body... you really basically need next to nothing. Maybe a yoga mat, couple of dumbbells, you're good... I have been in the best shape of my life in the last few decades when I was combining GST plus The Happy Body plus acro yoga."
▶ Play at 1:07:48
Tim Ferriss recommends it
"And GST is phenomenal. It is bodyweight exercises... it requires very, very little. You just need a floor... I have been in the best shape of my life in the last few decades when I was combining GST plus The Happy Body plus acro yoga."
▶ Play at 1:08:40What they recommend · 29 picks
Health & fitness
12 picks · Tim Ferriss ·Tim's health & fitness →
"I used the Oryx software, and I'm an investor in this company, which only happened after I tested it, because I used it for 30 days, 8 minutes a day, and I went from not being a..."
"I mentioned accelerated TMS, and you can get it from reputable providers... But you should find someone, I think, who's familiar with accelerated TMS and ideally, and this is ba..."
"My default, however, is actually a hybrid of those two, which is slow-carb diet with intermittent fasting, where I am fasting for at least 16 hours, and then I have an 8-hour wi..."
Tim, Joe, Andrew and Chris agree on 31 things
See what they all use, in their own words. Paid ads are left out.
See what they all swear by Or pick your own peopleBooks
8 picks · Tim Ferriss ·Tim's books →
"I'll add one resource to that. Read old books that contain principles, like The Effective Executive by Peter Drucker would be one that stands out. It's very short. It is very, v..."
"I read a book called The Surrender Experiment by Michael Singer. This was recommended to me by Kevin Rose and it was deliberately to offer me a counterexample... Very much enjoy..."
"There's an audiobook called Fierce Intimacy by Terry Real. I find Terry to be a beacon of clarity in a world of hand-wavy relationship advice... And I have found that incredibly..."
AI tools
2 picks · Tim Ferriss ·Tim's AI tools →
"Even if it's just as a thought exercise to journal on or to speak into Wispr Flow, for instance, so it transcribes your 10-minute brain dump, and you can throw it into something..."
Media & entertainment
2 picks · Tim Ferriss ·Tim's media & entertainment →
"I mean, I've seen Spirited Away probably 100 times... These are movies that I play on mute while I'm writing books."
"And I'll listen to music, typically something without vocals, like a deadmau5 Work Moar, M-O-A-R, playlist, which you can find pretty easily."
Other picks
5 picks · Tim Ferriss
"Ask them to red team... If this company, if this relationship fails in 2 years, what do you think the most likely reasons would be? That does not give them the option to back ou..."
"This is borrowing from Tony Robbins... a progression, and I use this for everything, including writing, including working, hard conversations, and that is state, story, strategy..."
"Every once in a while for recording, I will do that. I use Delta G ketones... in this particular case, the Delta G has the 1-3 butanediol bound to BHB... I use the health versio..."
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