Instead of slogging away on the treadmill, rethinking fat-burning exercises as a fitness challenge keeps the scales moving ...

While both look the same on the scale, water weight and body fat are distinctly different. Water weight tends to come on quickly, while body fat builds up gradually. Share on Pinterest Kerkez/Getty ...

Rapid changes on the scale do not necessarily mean rapid fat loss. A sudden drop over a few days can largely reflect water ...

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 ...