An apparatus which includes a strut system combined with an adjustable hinge system which substantially prevents or rehabilitates damage to the knee, especially due to frequent or prolonged periods of squatting or crouching. The strut system compresses while the weight of the body is absorbed by the combination of the strut and hinge system thus continuing to relieve the knee joint of excessive pressure during the entire squat or crouch. The effective life and maximum mobility of the knee is thus extended. Prolonged or even frequent crouching or squatting can be performed without the tiring out of the knee joint, discomfort, pain or damage to the knee. Subsequently, when the wearer stands up, and the knee is substantially extended, the hinge and strut system can aid in the lift of the body as the springs recoil while the strut provides additional lift support to the knees.