Walking is also said to be less damaging to the knees and feet. This makes it a better choice of exercise for older adults.
(MUSIC)
BOB DOUGHTY: Another popular form of exercise is jogging, or running at a slow to medium speed. USA Track and Field Hall of Famer, Bill Bowerman, was credited with bringing jogging to the United States in the nineteen seventies. He did so after witnessing the popularity of the activity himself during a trip to New Zealand in the nineteen sixties. He started the first running club in America and wrote a book about jogging for fitness. Bill Bowerman also helped establish Nike, the tennis shoe company.
Jogging provides great physical conditioning for the heart and lungs. And, it increases the flow of blood and oxygen in the body. All of these things combined help to improve heart activity, lower blood pressure and cholesterol levels, and reduce bone and muscle loss. Running is also a good way to lose weight. People burn an average of one hundred sixty calories a kilometer while running.
SHIRLEY GRIFFITH: The Census Bureau says swimming was the second most popular sports activity in the United States in two thousand eight. The top activity was exercise walking. Swimming is said to be one of the best ways to exercise. Nearly all of the major muscle groups are put to work.
Swimming also presents less risk of muscle and joint injury because of the body’s weightlessness in water. This makes it a great choice of exercise for people with special needs, like pregnant women, older adults, and persons who are overweight.
最新
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25