The vastus lateralis, a robust quadriceps muscle, occupies the lateral side of the thigh, contributing to powerful leg movements.

Origin:
Arising from the greater trochanter and the lateral lip of the linea aspera of the femur, the vastus lateralis has its origin on the posterior and lateral aspects of the femur.

Insertion:
The muscle inserts into the quadriceps tendon, which converges with the patellar ligament, attaching to the patella and tibia.

Function:
The primary function of the vastus lateralis is knee extension, working with other quadriceps muscles to straighten the leg. It plays a pivotal role in activities like standing, walking, running, and jumping, providing strength and stability to the knee joint. The vastus lateralis is instrumental in maintaining balance during lower limb movements and supporting various dynamic activities.

Knee Extension (Leg Extension)

Squat

Machine Squat

Lunge

Side Lunge

Leg Press