Background Osgood-Schlatter disease (OSD) of the knee in youth is one of the most frequent of anterior knee pain in athletes. There are several risk factors that contribute to this disease. Objective ...

A muscle in the quadriceps, the rectus femoris muscle is attached to the hip and helps to extend or raise the knee. This muscle is also used to flex the thigh. The rectus femoris is the only muscle ...

The rectus femoris (RF) is one of the four muscles found in the quadriceps and is the only one involved in hip flexion. This is because it’s the only one that is attached at the pelvis and not the ...