Hinge joints allow flexion and extension only. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl. The knee flexes ...

Leg extensions are one of the most effective exercises for isolating the quadriceps. Unlike compound movements like squats or lunges, the leg extension machine specifically targets the knee joint, ...

As one of a University Extension committee which has founded a vigorous local centre in a large city, I have seen the most of the literature of the movement pro and con. Certainly nothing better has ...