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We all need exercise. Exercise uses up foodthatwe eat and keeps the body full energy(能量). Exercise makes your heart and muscles(肌肉) strong. Exercise makes you feel relaxed. If you exercise several times a week, you will stay happy and . There are many to exercise. You can walk, run or swim.
However, most people cannot do this. It is too far from their homes to their offices. They have no choice to drive to work. First, these people don't have a chance to exercise because they are sitting in their cars for two to four hours each day. Second, driving is challenging(具有挑战性的), in rush hours, and needs too much attention. It makes a person tired out. When these people arrive home after work, they don't want to take exercise.
Some western countries, such as the United States, have problems with . Many people don't have enough exercise. They have to work from morning till night, so they don't have time exercise.
Today, many people in the West are fat, which causes health problems. Doctors say exercise can help people both lose and improve their health. So many people are trying to get more exercise. But it takes time to change, and when people don't see a right away, they will lose heart and stop exercising.
