Millions of people around the world wear smart rings and fitness trackers to keep tabs on their sleep, workouts, heart rate ...

Get the most out of the app, and make the strap more comfortable while you're at it.

How I used the chatbots Gemini and Claude as an AI personal trainer to take the guesswork out of diet and exercise.

Green means go, red means stop. Trophies or confetti come with good performance, and people who fall behind get nudged to do ...