A thigh strain or quadriceps strain is a tear in one of the four quadriceps muscles at the front of the thigh. These muscles consist of the vastus lateralis, vastus medialis, vastus intermedius, and the rectus femoris. The most common muscle to injure is the rectus femoris as it crosses b...
An underactive Iliopsoas muscle is very common within running athletes who have a tendency to use rectus femoris, one of the quadricep muscles, to generate hip flexion, instead of iliopsoas. This is an extremely common running technique flaw. Why do some runners overuse rectus femoris?<- Learn ...