Energy

The mortality benefit of daily steps levels off around 6,000–8,000 for older adults and 8,000–10,000 for younger ones — here is how to build a walking habit around the real number instead of the myth.

The real hydration numbers — about 3.7 L/day total water for men and 2.7 L for women, with ~20% arriving from food — plus which drinks count, and why thirst beats tracking apps.

Ten minutes of outdoor light within an hour of waking is one of the cheapest sleep interventions there is — the lux numbers, the camping study behind it, and how I fit it into real mornings.

Half your plate plants, a quarter protein, a quarter fiber-rich carbs, plus a little fat — the plate method with real numbers, three sample days, and the mistakes I made learning it.