Feeling from your knee down is relayed to your brain by the tibial nerve. This nerve is also responsible for sending messages from your brain down to your lower leg. The tibial nerve stems from your ...

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. It’s easy to exercise ...

The muscular system works to control the movement of our body and internal organs. Muscle tissue contains something called muscle fibers. Muscle fibers consist of a single muscle cell. They help to ...

Look down at the shoes on your feet or the pairs in your closet — it's likely their front tips curve upward. This is known as the toe spring. "We've all been wearing shoes with these toe springs, and ...