What is the Vastus Lateralis?
The vastus lateralis is one of the four muscles that make up your quadriceps, the large muscle group on the front of your thigh. It sits on the outer side of your thigh and runs from the upper part of your femur down toward your knee, attaching through the tendon that connects into your kneecap. In simple terms, it is the big outer “sweep” muscle that helps give the thigh its strong, curved shape when it is well developed and lean enough to see.