minor swelling is a warning that u may have done a bit too much. Been active is quite a benefit just dont over do it. Make sure after exercise or daily activities that cause the swelling to raise the knee above the heart. You lay down close to the wall and rest the heels on that while your back on the bed or floor. Do you know the wall slides if not ask the PT you going at to demostrate you the position which is what am trying to explain