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英语六级阅读理解:慢跑文章
Jogging has become the most popular individual sport in America. Many theories, even some mystical ones, have been advanced to explain the popularity of jogging. The plain truth is that jogging is a cheap, quick and efficient way to maintain physical fitness.
The most useful sort of exercise is exercise that develops the heart, lungs, and circulatory systems. If these systems are fit, the body is ready for almost any sport and for almost any sudden demand made by work or emergencies. One can train more specifically, as by developing strength for weight lifting or the ability to run straight ahead for short distances with great power s in football, but running trains your heart and lungs to deliver oxygen more efficiently to all parts of your body. It is worth noting that this sort of exercise is the only kind that can reduce heart disease, the number one cause of death in America.
Only one sort of equipment is needed a good pair of shoes. Physicians advise beginning joggers not to run in a tennis or gym shoe. Many design advances have been made in only the last several years that make an excellent running shoe in dispensable if a runner wishes to develop as quickly as possible, with as little chance of injury as possible. A good running shoe will have a soft pad for absorbing shock, as well as a slightly built-up heel and a full heelcup that will give the knee and ankle more stability. A wise investment in good shoes will prevent bilisters and the foot, ankle and knee injures and will also enable the wearer to run on paved or soft surfaces.
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