Tendonitis

Each muscle attaches to bones by way of tendons. Improper stretching and lack of proper hydration can lead to tightness, and susceptibility to tears. Many people experience a difficulty getting into the "catcher's position" deep squat because of this tightness. It is critical to frequently stretch the muscles the quads, hamstrings, calf, and peroneus. You will notice greater flexibility of the knee joint.

It is counterintuitive that tightness in the lower back can set off a chain reaction of tightness and joint stiffness in the knee. The violent twisting of the lower back in tennis, golf, baseball can set this chain reaction in motion, particularly if the associated muscles are not lengthened and stretched to accommodate the stress.

The body's tendency is to shorten and tighten up to prevent the action that is aggravating. Generally, the best response is to lengthen and strengthen the area. Generally, the body's natural reaction wins out.