Leg extension


The leg extensor is particularly suitable for isolated stress on the thigh extensor muscles. This exercise is used especially in bodybuilding to specifically pre-exhaust the muscle in order to then optimally load it in the following leg press exercise. However, the leg extension exercise is not intended for rehabilitation after a cruciate ligament O.P. suitable. This exercise is particularly suitable for soccer players, as the thigh extensor is performed in a movement that is similar to a shot in soccer. However, many athletes train these muscle groups sufficiently and forget about training the antagonists of this muscle group. The hamstrings are particularly suitable for exercising the hamstring muscles.

Trained muscles

  • quadriceps thigh muscle (Quadriceps femoris muscle)

Illustration of the front leg muscles

  1. Tailor muscle
    Sartorius muscle
  2. medium lower leg extensor
    Vastus mediales muscle
  3. thigh straight muscle
    Rectus femoris muscle
  4. lateral lower leg extensor
    Vastus lateralis muscle
  5. anterior lower leg muscle
    Tibialis anterior muscle

Description leg extension

Correct setting of the device is a prerequisite for performing the movement optimally. The Knee joint must match the swivel joint of the leg extension so that an axial design can be guaranteed. The sitting position is chosen so that the gluteal muscles keep contact with the backrest. The feet are not drawn in or stretched out as initially assumed, but are carried along in a natural movement. The training weight and the number of repetitions depend on the training goal.


Since there are often errors in the execution of movements and in the device settings during this exercise, it is advisable to consult a qualified fitness trainer before exercising. In addition, this movement results in heavy strain on the patellar tendon.


To make the exercise more effective, you can turn your feet in at the highest point (supinated) or turn them out (pronated) in the advanced area.