You don't need weights to build leg strength, just this three-move routine

Woman exercising at home next to a couch. She is midway through performing a Bulgarian split squat, with her rear foot elevated on a stool and both knees bent to 90°.

When we have strong legs, we improve our ability to perform everyday activities such as walking, running and climbing stairs. Plus, our coordination increases, reducing the risk of fall-related injuries as we get older.

It's often recommended that we need to train our legs with weights because they contain such large muscle groups. But in this online workout, Sandy Sklar, certified trainer and founder of the XFIT app, uses unilateral exercise and time under tension to really challenge the lower body without weights. Increasing the time the muscle is under tension for really taxes the muscles, and because they are forced to work harder, it can optimize muscular strength, endurance and growth.