Leg Extension

Exercise / Leg

Leg Extension

Leg extensions are a popular isolation exercise that primarily target the quadriceps muscles, which are located at the front of the thigh. Leg extension exercises typically involve the use of a leg extension machine found in most gyms. Here’s a step-by-step guide on how to perform leg extensions:

How To do:


  1. Set the leg extension machine to your appropriate height and adjust the backrest and footpad to align with your body.
  2. Sit on the machine with your back against the backrest and your feet firmly placed against the footpad. Make sure your knees are aligned with the pivot point of the machine.
  3. Position your legs under the padded lever or roller of the machine. The pad should rest against the front of your ankles, just above your feet.
  4. Grasp the handles provided on the machine for stability and support throughout the exercise. Keep your upper body relaxed and maintain good posture.

Execution of the exercise:

  1. Exhale and contract your quadriceps to extend your legs. Straighten your knees and lift the weighted lever or roller by pushing your feet forward.
  2. Continue the movement until your legs are fully extended, but avoid locking your knees at the top of the movement.
  3. Pause briefly in the extended position, focusing on squeezing your quadriceps.
  4. Inhale and slowly lower the weight by bending your knees and returning to the starting position, controlling the descent.
  5. Repeat the exercise for the desired number of repetitions.

Leg Extension – Benefits

Quadriceps Strengthening: Leg extensions primarily target the quadriceps muscles, including the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. By performing leg extensions, you can isolate and strengthen these muscles, leading to improved quadriceps strength and development.

Muscle Definition: Leg extensions can help enhance the definition and shape of the quadriceps muscles. As the quadriceps become stronger and more developed, they can contribute to a more aesthetic appearance of the legs.

Lower Body Strength: Leg extensions are an effective exercise for developing lower body strength, particularly in the quadriceps. Strengthening these muscles can enhance overall lower body strength, which can improve performance in activities like running, jumping, and squatting.

Muscular Balance: Many lower body exercises, such as squats and lunges, primarily target the quadriceps. Leg extensions help create a balance between the anterior (front) and posterior (back) muscles of the legs by focusing on the quadriceps. This balanced muscle development can contribute to overall leg symmetry and reduce the risk of muscle imbalances.

Knee Stability: Strong quadriceps muscles play a crucial role in providing stability and support to the knees. By regularly performing leg extensions and strengthening the quadriceps, you can help improve knee joint stability and potentially reduce the risk of knee-related injuries.

Rehabilitation and Injury Prevention: Leg extensions can be beneficial during rehabilitation after certain knee injuries, as they allow controlled strengthening of the quadriceps while minimizing stress on other structures. Additionally, strengthening the quadriceps through leg extensions can help prevent knee injuries by providing better support and stability to the joint.

It’s important to note that while leg extensions offer benefits, they primarily target the quadriceps and may not provide a comprehensive lower body workout. It’s recommended to include a variety of exercises that target different muscle groups to ensure overall leg strength and balance.

Leg Extension Muscles Worked

Target - Quadriceps
leg extension muscle worked