Medically reviewed by Suzanne Fisher, RD Key Takeaways Body mass index (BMI) is a calculation used to estimate your body fat.

For bodybuilders and fitness enthusiasts, changing body composition often reflects hard work and discipline—but knowing body composition is useful for anyone, and for more than just bragging rights.

This article was reviewed by Felix Gussone, MD. Key Takeaways: Body composition offers a clearer picture of health than weight alone, because it reflects your unique proportions of fat, muscle, bone, ...

When it comes to measuring your health status or fitness level, there’s no shortage of metrics out there, which makes figuring out which ones actually matter confusing. One number you might want to ...

Understanding your body goes well beyond a mere number on the scale. That's where DEXA (Dual-Energy X-ray Absorptiometry) scans come. This low-dose X-ray measures bone density, muscle mass, and body ...

There are various types of body composition tests (more on these below). Still, each one measures the percentages of fat and fat-free mass (muscle and bone) in the body. Knowing these percentages can ...

The number on the scale doesn’t reveal everything about your health. In an era dominated by smartwatches and fitness apps, tracking health has never been easier—or more confusing. The sheer volume of ...

According to a recent study, reducing body fat can improve long-distance running and cross-country skiing performance. However, a more effective way for female athletes to optimize their body ...

Builder 2nd Class Liam Mahaney (left), an assistant command fitness leader, takes height and weight measurements from Lt. Clara Lee (right), both assigned to Naval Medical Center San Diego (NMCSD), ...