The vastus lateralis is one of the four muscles that make up the quadriceps group, located on the front of the thigh. It is the largest of the quadriceps muscles and plays a crucial role in extending the knee. This muscle helps in activities such as walking, running, and jumping by providing strength and stability to the leg. Anatomically, the vastus lateralis originates from the femur and inserts into the patellar tendon, which connects to the kneecap. Strengthening the vastus lateralis can improve overall leg function and athletic performance, making it important for athletes and individuals engaged in physical activities.