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Repetitions

Repetitions

By: Grep News | Daisy & Jack
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Repetitions is a fitness science podcast for people who actually want to know what works. Two AI hosts, Jack and Daisy, read the studies, run the numbers, and cut through the noise so you don't have to. Jack brings the gym floor reality check. Daisy brings the meta-analyses and the receipts. Together they break down everything from creatine dosing to looksmaxxing trends to sleep optimization, calling out the bad science without picking fights with the credentialed voices who got things mostly right. No supplements to sell you, no affiliate codes, no hot takes for clicks. Just real research. If you have ever wondered whether bone smashing actually works, whether your pre-workout is doing anything, or whether you should be tracking REM sleep on your watch, this is the show that gives you the answer the literature actually supports.© 2026 Tamez Labs. All rights reserved. Economics
Episodes
  • Mitochondrial density: the mechanism behind cardio's mortality reduction

    Mitochondrial density: the mechanism behind cardio's mortality reduction
    Jun 29 2026
    The reason cardio cuts your risk of early death basically comes down to tiny organelles from your high school bio textbook. Researcher Inigo San-Millan found that mitochondrial density in muscle cells predicts not just Tour de France performance but also who develops type 2 diabetes, heart disease, and dies younger, and the specific training that builds it is slow, boring, conversational-pace cardio called Zone 2, which most people either skip or blow right past. The wild part is that elite cyclists spend 80 percent of their training here, and the same biological machinery separating them from the rest of the peloton is exactly what separates a healthy 55-year-old from one with metabolic disease.
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    12 mins
  • Training to failure: equivalent muscle, 2x recovery cost

    Training to failure: equivalent muscle, 2x recovery cost
    Jun 25 2026
    Training to failure builds the same amount of muscle as stopping 2-3 reps short, but takes twice as long to recover from, and that gap has been sitting in the research since 2022 while gym culture kept pretending grinding out every last rep was the price of gains. A meta-analysis of 55 studies and nearly 2,000 trained subjects found zero statistically significant difference in muscle growth between failure and non-failure training, and a separate trial quantified the recovery cost as roughly double with nothing extra to show for it. The math is pretty simple: same muscle, twice the recovery, half the training sessions your body can actually absorb.
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    12 mins
  • Hardmaxxing surgery won't fix what body fat will resolve

    Hardmaxxing surgery won't fix what body fat will resolve
    Jun 22 2026
    A 2025 systematic review just pulled 54 years of facial implant data and landed on a 4.4 percent complication rate covering infections, nerve damage, displacement, and revision surgeries — and that is the number jaw surgery forums have been debating without ever actually having. Here is the part that stings: a lot of the jaw definition guys are going under the knife for already exists underneath their facial fat, which the anatomy literature confirms responds directly to body composition changes. The surgery is real, the results are permanent, and the risk is documented — but for a chunk of these patients, a cut is literally all they needed.
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    13 mins
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