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Weekly · Sunday Morning

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Rapamycin extends mouse lifespan 9–14%
NAD+ precursors reverse aging in humans
Blue-light glasses improve sleep quality
Walking 10 min after meals blunts glucose
Verdict change — caffeine half-life downgraded

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How to find a good personal trainer | Mike Israetel and Peter Attia — Whalespan

Content›Video›How to find a good personal …

How to find a good personal trainer | Mike Israetel and Peter Attia

Peter Attia8m · 2025-02-13

Claims Made

14

Claims Supported

9

Support Rate

64%

Support rate

9 of 14 claims supported

9 supported5 partial / not

Claims from this content

7

◐Partially SupportedConnecting with a trainer who motivates you to exercise is highly valuable, even if they lack deep evidence-based knowledge.◐Partially SupportedIt may be necessary to switch trainers if they lack knowledge or disagree with established principles of training and nutrition.◐Partially SupportedLearning from a trainer for a few weeks or months can help an individual assess if the trainer's methods are effective and evidence-based.✕Not SupportedA trainer who dismisses evidence-based nutrition advice without a systematic approach may be incompetent.Partially Supported

More from Peter Attia

Peter Attia on Zone 2 Cardio

Peter Attia on Rapamycin (with Matt Kaeberlein)

Attia walks back the clinic protocol: too aggressive for healthy adults

Discussion

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AV

A. Volkovreader

4h

Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

NP

N. Park

2d

Would love a "what would change this verdict" RSS feed. Sign me up if it exists.

◐

A trainer having an undergraduate degree in kinesiology or a related field can help filter out less competent trainers.

◐Partially SupportedA trainer's physical appearance is largely determined by genetics, diet, and long-term habits, and should not be the primary basis for judging their knowledge.

◐Partially SupportedTrainers who integrate scientific literature and broad basics into their practice are likely better than those who rely primarily on personal experience and intuition.