 Although studies in the past have shown a benefit of the use of CPM in those individuals having undergone a TKA, recent research has shown that the benefits are questionable.When groups that only received standard mobilization therapies were compared to groups that received CPM treatment in addition to this same therapy, the results suggest that there is no significant increase in functional outcomes or length of hospital stay, or a decrease in adverse affects related to the surgery.These results weren’t adequate for supporting the use of CPM over potentially more successful interventions, such as active exercise that is both high in intensity and velocity.