Tuesday, January 4, 2011

The Benefits of Exercise

Exercise is a big part of staying physically fit. People who are physically fit are alert and full of energy. Exercise can also help people handle stress. Exercise is especially good for children, teens, and older persons.

EXERCISE THAT HELPS THE HEART
Doctors say that regular aerobic exercise leads to a healthier heart. Jogging, walking, riding a bicycle, and other aerobic exercises lower the risk of heart disease. In one kind of heart disease, fatty stuff called plaque builds up in blood vessels going to the heart. Aerobic exercise helps prevent this buildup. Aerobic exercise also makes the heart and lungs stronger.

Doctors say you should do 20 to 30 minutes of aerobic exercise at least three times a week. You need to exercise hard enough to get your heart beating faster than normal. You can feel your heart beating. Use two fingers to feel a beat, or pulse, in your wrist or neck.

EXERCISE THAT INCREASES STRENGTH

Some kinds of exercise are better at increasing strength than others. Usually people work out with weights if they want to improve their muscle strength. They use free weights, weights that are not attached to anything, such as barbells. Or they use strength-training machines. Strength training can also make bones stronger.

It is a good idea to have a trainer or physical education teacher show you how to lift weights properly. It is important not to injure yourself when lifting weights. Start out with small weights. Try lifting heavier and heavier weights as your muscles get stronger.

EXERCISE THAT HELPS CONTROL WEIGHT

Aerobic exercise can help you lose weight. It can help you stay at a healthy weight. Aerobic exercise burns calories.

A calorie is a unit of measurement. It measures the amount of energy in foods. It measures the amount of energy your body uses.

When you take in the same number of calories that you burn every day, your weight stays the same. If you take in more calories than you burn, you gain weight. If you take in fewer calories than you burn, you lose weight. Regular exercise helps you burn calories.

Strength training may also help with weight control. Lifting weights burns calories. Lifting weights also makes more muscle in your body. Muscles burn more calories than fat.

EXERCISE THAT MAKES YOU FLEXIBLE

Stretching exercises can make your body more flexible. There are stretches for your arms, legs, neck, and trunk. Many people do slow exercises and stretches called yoga to make their bodies more flexible. A physical education teacher can show you how to do stretches.

You should do warm-up stretches before you do aerobic or anaerobic exercises. You should do cool-down stretches when you are finished exercising. Warm-up and cool-down stretches can help prevent muscle injuries.
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