QUADRICEPS · MACHINE

How to do the machine leg extension

The machine leg extension trains your quadriceps. Here is how to do it with good form.

Person doing the machine leg extension
Photo: No machine-readable author provided. GeorgeStepanek assumed (based on copyright claims)., CC BY-SA 3.0, via Wikimedia Commons. Resized.

Step by step

  1. Select the appropriate load.
  2. Adjust the pad to be against your lower legs, just above your feet when seated.
  3. Sit down, grab the handles by your sides, place your lower shins against the pad, and retract your shoulders.
  4. Take a breath and straighten your legs by engaging your quadriceps.
  5. Lift the weight until your knees straighten, and breathe out.
  6. Hold for a moment and bend your knees slowly as you breathe in.

Muscles worked

PrimaryQuadriceps
EquipmentMachine

Sets and reps

Strength3–5 sets of 3–6 reps, 2–3 min rest
Muscle growth3–4 sets of 8–12 reps, 1–2 min rest
Muscular endurance2–3 sets of 15–20 reps, 30–60 s rest

Pick the row that matches your goal. Add weight or reps once every set feels controlled, and log each set so you can see the trend.

Programs that use the machine leg extension

Track your progress

Repto shows what you lifted on your last session for every set, suggests your next weight, and starts the rest timer when you tick the set. Your estimated 1-rep max and volume for each exercise are charted over time.

Alternatives for your quadriceps

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