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.

Biologists have built up one of the most detailed pictures ever of the changes that occur in women’s bodies before and after pregnancy, by pooling and studying around 44 million physiological ...

Some people check a wristwatch; others use a smartphone app or the position of the sun. But although these methods will tell you what time it is, they won’t reveal your internal time – that is, the ...

Walking is one of the simplest, most accessible ways to stay active—but what if you flipped the script and put it in reverse? Backward walking (a.k.a. retro walking), is a fitness trend that’s ...