The best Fitbit depends on your budget, intended use case, and need for advanced features in an activity tracker.Through extensive testing, we've selected the Fitbit models below based on tracking ...

Inside the quiet rebellion of women upgrading their bodies - IN FOCUS: Faced with a medical establishment that doesn’t serve ...

Oura Ring and Apple Watch are the most popular wearables for tracking your health and fitness. A longevity expert talks ...

Is it easier to fall asleep in low gravity?” and other spaceflight questions, answered by two NASA sleep scientists.