Toning your back at home can be just as effective as working out in the gym. We're highlighting a few routines that require no equipment.

Share:
More In Science
1st Babies Born in Britain Using DNA From 3 People
Britain's fertility regulator on Wednesday confirmed the births of the U.K.'s first babies created using an experimental technique combining DNA from three people, an effort to prevent the children from inheriting rare genetic diseases.
Load More