Body & Mind

Cold showers, plunges and winter swimming: what is actually proven about brown fat, metabolism and alertness, and who should treat cold with real caution.

Strong social ties are associated with a lower risk of death on a scale comparable to quitting smoking, and loneliness is a risk factor in its own right.

Sarcopenia takes strength and independence with age, and strength training is the main proven way to slow it down — at any age, including after 80.

In Finnish cohort studies, regular sauna bathing is associated with a lower risk of cardiovascular death, through a heat load that resembles light aerobic exercise.

The 10,000-step target is a 1960s marketing figure: most of the longevity benefit shows up by 7,000–8,000 steps a day, and earlier still in older adults.

Chronic stress accelerates aging through cortisol, inflammation and shorter telomeres — here is what it does to the body and what reliably lowers it.

Grip strength is a simple, low-cost marker of longevity that mirrors whole-body strength: what it reflects, how to measure it, and how to improve it.

VO2 max is your body’s engine size and one of the strongest predictors of mortality: what it measures, how to check it, and how to raise it.

Sleep is active repair, not downtime: how each stage works, what short sleep does to aging, how much you need, and an evidence-based way to fix it.