Low levels of cardiorespiratory fitness are linked with heart disease, the leading cause of death in the United States. It is characterized by activities of short duration at high intensity. Lifting a heavy object such as a suitcase or 100-pound weight one time are examples. Strong muscles are important for the smooth and easy performance of everyday activities, such as carrying groceries, lifting boxes, and climbing stairs, as well as for emergency situations. They help keep the skeleton in proper alignment, preventing back and leg pain and providing the support necessary for good posture.
Muscular strength has obvious importance in recreational activities.
Strong people can hit a tennis ball harder, kick a soccer a ball farther, and ride a bicycle uphill more easily. Muscle tissue is an important element of overall body composition. Maintaining strength and muscle mass is vital for healthy aging because muscular strength and endurance tend to decline with age. This loss can be delayed and strength can be maintained by participating in a strength program. Many people have joined health clubs and are enjoying the benefits of using weight equipment such as Universal, Nautilus, and Cybex.