Your hamstring muscles.
The muscles used to lift the leg while lying down are primarily the hip flexor muscles, including the iliopsoas and rectus femoris. These muscles work together to flex the hip joint and raise the leg off the ground.
The leg muscle twitches because the pleasure is so great that it causes your body to unintentionally flex muscles in the area of pleasure.
You are using your thiegh and leg muscles
The muscles that flex and extend your finger are not as large as those in your leg. As a result, the biochemical processes that cause muscles to flex are limited. Trying to exert leg-force with your hands is a bit like using a moped to haul a boat.
The primary muscles responsible for flexing the leg at the knee joint are the hamstrings (biceps femoris, semitendinosus, semimembranosus) and the gracilis. These muscles work together to bend the knee and bring the lower leg towards the thigh.
The dorsiflexors include the extensorum longus, the tibialis anterior, and the peroneus.
you use your leg muscles alot and your arm muscles. you use your leg muscles alot and your arm muscles.
we already have leg muscles at birth. what was the actual question?
The muscles used in a squat jump are the quads, and the hamstrings. The lower back muscles and the abdominals are used also
intermittent claudication
The muscles used in the leg press exercise are your Quads primarily. Hamstring gets a good work out too.
The knee helps your leg flex and extend.