| machines. Because muscles are
actually composed of groups of fibers, resistance training helps the muscle
fibers lengthen and thicken, which, in turn, increases the muscle’s
strength. Gradually, as the muscles strengthen, the amount of force can be
increased to further build strength. Studies show that the benefits of
resistance training can be attained by just three 20-minute sessions per
week. Health professionals recommend resistance training for all people, not
just body builders, as a way to promote cardiovascular health. In addition,
resistance training can assist a weight loss program by increasing lean
muscle and decreasing body fat. It helps prevent osteoporosis by increasing
bone density. It may also be helpful for diabetics by improving glucose
tolerance. No person, particularly those with heart disease or high blood
pressure, should begin resistance training without consulting a physician,
because it does put some extra strain on the cardiovascular system. |
