Smart scales track changes in your muscle mass, body fat percentage and other health metrics — but how do smart scales work, and how accurate are they? When you purchase through links on our site, we ...

The number on the scale does not tell the whole story. Your body weight does not account for your body fat, muscle mass and bone density, and will not tell how much of it is due to water retention or ...

Thanks to the ever-improving world of fitness trackers and apps, you've never had more access to personal health data. But which of the dizzying number of markers and metrics should you really be ...

Walking might seem simple. But it’s not, explains epidemiologist Peggy Cawthon, science director of the California Pacific Medical Center Research Institute. It’s an amazingly complex behavior that ...

Biological age tests measure how fast your body is aging compared to your actual age. These tests rely on biomarkers tied to ...