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Resisted Knee Extension (Post-ACL) exercise demonstration
Exercise library

Resisted Knee Extension (Post-ACL)

Light resisted knee straightening within the surgeon's protocol, rebuilding quadriceps strength after graft healing time.

Area
Post-op
Stage
Strength phase
Equipment
A resistance band, A sturdy chair

Typical dose: 3 sets × 10 reps · once a day, 4 days a week · slow and controlled. This is a general starting point, not a plan matched to your condition or stage.

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How to do it

You need: A resistance band, A sturdy chair.

Sit tall in a sturdy chair with a light resistance band looped around the ankle of the operated leg and anchored to a chair or table leg behind you.

  1. Start with the knee bent and the band pulling it gently backward.
  2. Straighten the knee against the band, going as far as your surgeon's protocol allows.
  3. Squeeze the thigh muscle for a moment at the end.
  4. Lower the knee back slowly, resisting the band all the way.

Form cues

  • The movement is smooth and controlled in both directions.
  • You work within the range your surgeon has allowed, not forcing full straightening too early.
  • The thigh muscle does the work, and the knee joint feels supported.

Common mistakes

  • Using a heavy band too soon after the graft.
  • Snapping the knee straight or letting it drop back quickly.
  • Working into a range or load your protocol does not yet allow.

Safety: Stop and message your physio if you get pain around the graft site, the knee swells or gives way, or the wound becomes hot, red, or leaks.

Part of these recovery programmes

This exercise is one step in a staged plan for the conditions below. Each link opens the full programme and shows where this exercise fits.

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