The quadriceps muscle, often referred to as the "quads," is a large muscle group located at the front of the thigh. It consists of four individual muscles: the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. These muscles work together to extend the knee, playing a crucial role in activities such as walking, running, and jumping. The quadriceps are essential for maintaining stability and balance in the lower body. They also help support the patella (kneecap) and are important for overall leg strength. Strengthening the quadriceps can improve athletic performance and reduce the risk of knee injuries.