Thinking

Ideas, worth doing.

Essays from the team on the knowing and doing gap, post-tracking health, the science of doing, and applied longevity.

17 August 2026

Does lactic acid cause muscle burn and soreness? What the evidence shows

Lactate is a fuel your heart and brain burn. It does not cause the burn in your legs, and it is not why you ache two days later.

Cutting a night short does not cost every sleep stage equally. What the evidence says about deep sleep, REM, alcohol, caffeine and sleep trackers.

Fourteen trials, 182,880 adults, no lives saved. What the evidence says about health checks, wearables, rest and the one number that answers to work.

Creatine raises phosphocreatine in some people and barely moves it in others. What decides which you are, and a twelve-week test that tells you.

Almost nobody rebuilding health came out of medicine. What that says about the retreat market, and how we build what we sell.

Muscle after 40 is your largest glucose store, an endocrine organ, and the only load bone answers to. What eight studies actually show.

Static stretching has weak evidence for preventing injuries in healthy athletes. Progressive loading has considerably stronger evidence.

A hard week at work and a hard session draw on one shared reserve. How to read that balance before you overspend it.

Fructose carries no fixed value. Liver glycogen, energy balance and current demand decide whether it becomes fuel or a load on the liver.

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