regarding your muscle stimulator. Aren't there knobs to adjust the strength of the stimulation on your machine? I have an interferential muscle stimulator machine, and it is a God send. Many of the muscle stimulator machine can be set up with different frequencies depending upon the reason you are using it. There should also be an adjustment knob for the intensity level. normally, you start it off at a low setting. Then, as your body produces endoraphines and you begin to no longer feel the pulses, you can turn the intensity up a little. Didn't the physical therapy place set the machine up for you and show you how to use it? Your hubby's leg should not be jumping like that; he has the settings too high.