Overview
The quadriceps are the four large muscles on the front of the thigh: rectus femoris, vastus lateralis, vastus medialis and vastus intermedius. Together they straighten the knee; rectus femoris also helps flex the hip.
Key Role
- Control lowering into a squat, stair descent and landing
- Produce force to stand, climb, jump and accelerate
- Help guide and support the kneecap through knee motion
Build This Muscle
- Barbell back squat — a main loaded squat pattern
- Bulgarian split squat — unilateral strength and control
- Barbell reverse lunge — controlled knee and hip loading
- Wall sit isometric — adjustable quadriceps endurance
Watch Out For
Pain at the front of the knee is not automatically a quadriceps issue. The kneecap, patellar tendon and hip can all contribute. A pop, fast swelling or inability to actively straighten the knee needs assessment.
Related Guides
This information is for education only and is not a medical diagnosis.