For decades, people have guessed at the age when the body truly starts to slow down. Now a rare 50‑year fitness project, tracking the same adults across most of their lives, offers one of the clearest ...

A comprehensive Swedish study followed 427 people throughout their lives to determine when peak performance… peaks, and how dramatically it falls. The longitudinal research followed both men and women ...

Experts say gait speed, grip strength, balance, and endurance are some of the strongest predictors of long-term independence. Here’s how to check them yourself—and what the results mean. Balancing on ...