Scientists say this is the best exercise for reducing body fat in elderly people - High-intensity interval training, or HIIT, ...

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.

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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 ...

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 ...