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 ...

Using Newton's laws of motion and devices made from springs, astronauts on the International Space Station can measure their body mass. When you purchase through links on our site, we may earn an ...

Here’s what to know about body composition numbers and what these metrics mean for your health and performance.

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. We’ll start at the very beginning: Body mass index (BMI) is a measure of someone’s weight compared to their height whereas body fat ...

A body composition scale analyzes how electrical signals flow through your body, estimating how much of your total weight is fat-free mass compared to body fat. You may not always get every answer you ...

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 ...

The American Medical Association released a new policy on how doctors should use body mass index (BMI), acknowledging the metric's inherent flaws. When you purchase through links on our site, we may ...

The military’s new height to waist standards aim to better measure health and readiness, but raise concerns about fairness, ...

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 ...