Used after ruptured cruciate ligaments in his right knee, resumption of football as if nothing had happened. Good to get used to feeling something on the knee that had not before. Easy to set up, by ctre after 30 machines..se deteriorates a little, even if I do not need it anymore I do not pass me because you never know if I get hurt, I would feel guilty of not having mise..je repeat, does not interfere with sports running ... etc .. the only downside of this product is its price prix..trop ..