During knee rehabilitation, the challenge is to protect the injured joint surfaces from excessive force while providing adequate training stimuli for the quadriceps.
This study graded knee joint loads during squat, lunges, single leg hop, stairs, standing up and down and gait.
Tibiofemoral (TF) contact forces (CF's) were equal or lower than gait for sit down, stand up, stairs and squatting and could be useful during early TF rehabilitation.