The quadriceps is a big muscle made up of four main muscles: Rectus femoris: Located at the front of your thigh, it helps with hip flexion and knee extension. Vastus lateralis: Found on the outer ...

The step-up with deliberate co-activation resulted in greater activation of the hamstrings, greater co-activation indices for semimembranosus-vastus medialis and biceps femoris-vastus lateralis ...

A study of NCAA Division I football players revealed persistent atrophy in the quadriceps and gastrocnemius muscles 2 years after ACL reconstruction despite full return to play.“Quadriceps deficits ...

Background: The m. quadriceps femoris is the strongest muscle in the human body and plays an important role in sports, activities of daily living and independence. Two older studies showed ...