During a knee extension MMT, where is the resistance applied?

• A. On the anterior thigh just above the knee.
• B. On the posterior lower leg just below the calf.
• C. On the anterior lower leg just above the ankle.
• D. On the top of the foot.

Answer: (C)

Testing knee extension targets the quadriceps’ ability to straighten the knee. To do this, you apply resistance to the distal part of the lower leg, on the anterior surface just above the ankle. The patient attempts to extend the knee against that resistance, so the force you apply goes in the direction of knee flexion. This placement focuses the challenge on the knee joint and the quadriceps without involving other joints or muscle groups.

Placing resistance higher up the thigh would engage movements around the hip and not isolate the knee extension. Resistance on the posterior lower leg would primarily test knee flexion via the hamstrings. Pressing on the top of the foot would assess ankle movements rather than knee extension.