Medically reviewed by Amy Kwan, PT Hip dips are caused by the contours of fat, muscle, and bone structure in the hip area.

Tight hip flexors, especially a deep muscle called the psoas, can silently stress your spine. Here's why this muscle deserves ...

People with sartorius muscle pain may have pain in their knee or the front of their hip. Certain exercises can help strengthen the muscle and reduce pain. The sartorius is the longest muscle in a ...