Leg muscles are essential for movement and stability. They help us walk, run, jump, and perform daily activities. The main groups of leg muscles include the quadriceps, hamstrings, and calves. The quadriceps are located at the front of the thigh and are responsible for extending the knee. The hamstrings, found at the back of the thigh, help bend the knee and extend the hip. The calf muscles are located at the back of the lower leg and play a crucial role in walking and running by allowing us to push off the ground. Strong leg muscles support our body weight and improve balance, making them vital for overall fitness and mobility.