Knee braces are used for walking purpose which it self a complete exercise of leg and whole body. But for the other exercises one should concern to a professional.. Stretching, strengthening and technique improvement are much more important. You should make changes in intensity or training schedules little by little, to limit knee stress. Good strength and flexibility are important for holding down knee pain and injuries. You should work out an exercise plan with your doctor to get the best program for you. "