PHILADELPHIA -- The Eagles have brought back running back Jay Ajayi after losing veteran Darren Sproles for the rest of the season due to a torn right hip flexor, the team announced Friday. Starting ...

A hip flexor muscle in simple words refers to the muscle in your hip that helps you flex it and bring the knee closer to the chest. Every time you take a step, you are using your hip flexor muscles.

Philadelphia Eagles' Darren Sproles in action during an NFL football game against the New York Jets, Sunday, Oct. 6, 2019, in Philadelphia. AP Photo/Matt Rourke PHILADELPHIA (WPVI) -- Philadelphia ...

Objective This study aimed to investigate how knee extensor and flexor strength change over time after anterior cruciate ligament reconstruction (ACLR). Design Systematic review with longitudinal meta ...