Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. For strong, powerful ...

Do you ever wake up with tight, stiff legs and wonder why? Or maybe, during yoga class, you find it difficult to touch your heels to the ground in downward-facing dog. Either way, you could probably ...

A run coach shares a quick stretching routine designed to reduce tight hips, ease hamstrings, and improve mobility.

Ah, hamstrings: the middle child of muscle groups. While they might not be the sexiest parts of our bodies, strong hamstrings play a vital role in our overall strength and stability. To learn more ...

At first she thought she was feeling routine soreness, something that Donna Grubb-Hewlett was pretty sure she could muscle through. But when she heard a pop in the back of her leg during a February ...

A hamstring tear injury is a rip in the hamstring muscles. It happens when the hamstrings are overstretched or overloaded with too much weight. Depending on the injury, the hamstring can tear ...

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. Squats train all the major ...