Tucked deep in your hips and lower back, the psoas muscle won't get you any compliments at the beach—but keeping it strong and flexible is crucial to keeping your body feeling good.

Tight hip flexors, especially a deep muscle called the psoas, can silently stress your spine. Here's why this muscle deserves more attention—and how to strengthen it. Lower back pain is often blamed ...

Doctors determined a man's severe back pain was caused by a rare disease that leads to pus buildup in the psoas muscle. When you purchase through links on our site, we may earn an affiliate commission ...