If you want big arms – work the legs. Some experiments show that when two bodybuilders identically train their upper bodies and only one of them trains the lower body as well. After months of training the bodybuilder who performed the leg training added more muscle to the arms, chest, and shoulders. One of the possible reasons lies in the fact that leg training stimulates the temporal elevation of circulating growth hormone.

Release of this hormone is a natural response of body’s adaptation to the intensity of stress from workout. As the increased growth hormone kicks in, the blood stream delivers it to every cell in the body, providing the stimulus for muscle growth. So, why the legs? They