Active assisted flexion

Active assisted flexion is a seated exercise, where active flexion of the knee is helped further by pressure from the good leg.

Starting position with feet free to swing and the bad leg as relaxed as possible, probably a lot less flexed than in this example.

Use the good leg to slowly push the bad leg into further flexion.

Hold the position for a few seconds before relaxing, and repeat.

The assisting limb should apply a slow long stretch, gently taking the limb into deeper flexion even though it may be uncomfortable, holding it there for 20 seconds or so and then slowly releasing the pressure.

Measuring the range of motion of the knee with a goniometer

Range-of-motion is a key concept in knee rehabilitation. This paper discusses how it is measured.