VO2 max: the number that predicts longevity
The strongest single predictor of all-cause mortality in the research, outranking smoking and diabetes. What the data shows and what a real test involves.
Why your pain keeps coming back
Pain that keeps returning isn't a sign your body failed to heal. It's a sign the pattern causing it was never addressed, only silenced.
Why stretching isn't fixing your pain
A lot of chronic tightness isn't a short muscle. It's a guarding response protecting an unstable joint. Here's what actually breaks the cycle.
You're not recovering. You're just resting.
Rest and recovery are not the same thing. Why HRV and sleep matter more than a day off, and what a structured plan looks like.
Cold plunge, sauna, red light: the real evidence
Each modality has a real physiological mechanism, and a real, more limited evidence base than most marketing admits. The honest breakdown.
HRV: your body keeps score
One HRV reading tells you almost nothing. The trend tells you almost everything. What it measures, what moves it, and how it feeds a plan.
Longevity isn't luck. It's a system.
Six measurable systems: strength, fitness, metabolic health, recovery, hormones, and stress. Read them first, then train what the data flags.
ARX: strength training, measured every rep
Adaptive resistance matches the load to your real force output through every inch of every rep. A measured strength workout instead of a guess.
The fitness mistakes that cost you after 40
Three mistakes that quietly cost people strength and mobility after 40, and why an assessment-first plan protects capability instead of managing decline.
How much protein do you actually need?
The 0.8 g/kg number most people know is a floor built to prevent deficiency, not a target for training or aging well. The real, cited ranges.
Not sure where to start? Three taps, sixty seconds, and it names the system most worth your attention. Free, no login.
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Every post is written from the floor of the club, not a content calendar, and every claim is cited to the research it came from.
Meet Dr. Purscell
