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Health & Fitness

Jeremy Ethier

by Jeremy Ethier
Health & Fitness

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Latest episodes

  • Targeting Belly Fat Is... Possible?! (NEW Study)

    October 21, 2026 · 24 min

    Can you actually target belly fat? For 60 days, we put the most popular belly fat workout advice to the test — running a real experiment on how to lose belly fat using exercises to lose belly fat like targeted ab training, and measuring…

  • How Running Completely Changes The Human Body

    October 20, 2026 · 21 min

    I did 30 minutes of cardio a day (running every day for 30 days) while still lifting to settle the debate every lifter has: does cardio kill gains? It comes down to questions like cardio before or after weights, whether cardio and weight…

  • It's Weird, But It Re-Builds Your Tendons In 30 Days

    October 19, 2026 · 11 min

    If your knee pain, elbow pain, or shoulder pain keep clicking, aching, or getting re-injured, the real problem may be your tendons. This tendon rehab guide covers the two biggest mistakes that weaken them and the isometric tendon exercises…

  • I Proved My 6-Pack Abs Diet Works For ANYONE

    October 18, 2026 · 23 min

    What happens when you swap diets with someone three times your size — and what can it teach you about how to stop overeating? I put the best strategies to stop overeating to the test, building science-backed tips to stop overeating into a…

  • I Proved (Almost) Everyone Is Wasting Time In The Gym

    October 17, 2026 · 16 min

    How many days a week should you work out to build muscle — and is a 6-day workout plan in the gym actually better than training 3 days a week? We put over 200 lifters through a 10-week experiment comparing a 3-day vs 6-day push/pull/legs…

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  • It's Dumb, But It Builds Muscle Almost 4x Faster

    October 15, 2026 · 13 min

    If you've wondered how often to train muscle groups per week, you've heard it: train hard, then take rest days — 48 to 72 hours — for repair and growth. That's the logic behind best training frequency advice, and why choosing to train…

  • It's Weird, But It Destroys Your Body Fat In 30 Days

    October 14, 2026 · 20 min

    What if you could lose fat while eating huge meals, never counting calories, and rarely feeling hungry? To test that, I built the world's most filling diet: a volume eating plan that swaps calorie dense foods for high volume low calorie…

  • Why You Store Fat Here, And How To ACTUALLY Lose It

    October 11, 2026 · 13 min

    Why does stubborn fat disappear quickly from some areas but refuse to budge from others? In this video, I share how to lose belly fat and other frustrating problem zones, including how to get rid of belly fat around your sides, what to do…

  • It's Weird, But Destroyed Every Ab Exercise I Tested

    October 10, 2026 · 22 min

    In this video I'm testing 30 popular upper ab exercises, lower ab exercises, and all kinds of ab workouts to find what is actually best. Start your free 2 week trial of BWS+ below: https://bws.plus/spotify⁠⁠ Link to ab…

  • How to Get Lean in 60 Days (And STAY Lean Forever)

    September 24, 2024 · 14 min

    How to get lean: The process of getting lean and how to lose fat is actually very simple. It's not easy, but getting a lean body is 100% something anyone can do. If you follow my 3-part plan on how to get lean — from my fat loss diet and…

  • How to Build Muscle 2x Faster

    September 17, 2024 · 9 min

    What’s the best way to build muscle? Can “bad form” help you build muscle fast? We all know that guy who says he can do 30 pull-ups, and then they’re just half reps. But what if he’s onto a secret about muscle growth? Today, I’ll show you…

  • How I Lost My Belly Fat in 7 Days (Science Experiment)

    August 5, 2024 · 11 min

    How to lose belly fat in 1 week? Is losing stubborn belly fat 3 times faster even possible? For the next 7 days, I'll be following a science-backed fat loss plan designed to lose belly fat fast. I want to see how my body reacts and if this…

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About the show

Welcome to my podcast! I'm a science-based fitness researcher, YouTuber, and founder of Built With Science. On this podcast you'll find a mix of training and nutrition tips based on the latest advances in scientific research.