Your watch’s VO2 max isn’t perfect, but you can improve its accuracy with better data and heart-rate tracking.

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 ...

Explore the ADX indicator's role in measuring trend strength. Using ADX can enhance your trading decisions, helping you ...

Millions of people rely on wearable devices to monitor how well they're sleeping. Sleep trackers don’t necessarily measure ...