The following exercise helps build strong, balanced leg muscles. Make sure to adjust exercise machines as instructed by your physical therapist. He or she will tell you how many times to do the exercise.
Note: To prevent injury, always warm up and stretch before your strengthening exercises. Stop any exercise that causes pain. Discuss it with your physical therapist or doctor.
Start with your leg bent so your knee is at a 90-degree angle.
Push with your leg until it is almost completely straight. Be sure not to lock your knee.
Slowly and steadily return your leg to its original position.