There isn’t an exercise program that can beat aquatic exercise (deep and shallow) for rehab of the legs. Aquatic exercise is an extremely under-utilized program. Maybe this is because so few fitness instructors understand the medium and application of water properties in an exercise program?
I have taken pro and college athletes into the water for challenging workouts. It isn’t just for the injured and elderly. If any of you make it to the Big Island of Hawaii, you should check out my website and get in touch with me. I will gladly take you into the ocean or the Kona pool and open your eyes about aquatic exercise.