定期训练可防止男性猝死
http://www.100md.com
2000年11月9日
NEW YORK (Reuters Health) - A daily run or a regular game of tennis can do more than tone muscles and keep excess calories at bay. It may also help you avoid sudden heart failure, study findings suggest.
The 12-year study of more than 21,000 men found that those who exercised vigorously less than once a week were 74 times more likely to die suddenly while jogging, playing a racquet sport, or doing heavy yard work than while resting or only lightly exerting themselves.
In comparison, men who exercised at least five times a week were only 10 times as likely to suddenly die during the heavy exertion. The findings are published in the November 9th issue of The New England Journal of Medicine (news - web sites).
The overall risk of sudden death during exercise is extremely low, according to Dr. Christine M. Albert, from Brigham and Women's Hospital in Boston, Massachusetts, and colleagues. The authors note that the findings should not discourage sedentary people from beginning an exercise program.
``The benefits of exercise on heart disease clearly outweigh the small risk of sudden death during an episode of vigorous exertion described in our study,'' Albert told Reuters Health in an interview. She pointed out that the risk of sudden death during vigorous exercise was 1 in 1.51 million episodes of exertion.
``To obtain the benefits of exercise while minimizing the risks, one should exercise regularly rather than sporadically, and gradually build up to a vigorous exercise program,'' she said.
While the way that exercise leads to sudden death is not entirely clear, Albert suggested that exertion results in the release of adrenaline, a hormone that lowers the threshold for irregular heart rhythms that can precede heart attack. Or, it may be that exercise results in increases in heart rate and blood pressure, which stress the heart.
``Both of these effects are greater in individuals who do not exercise regularly,'' Albert noted. ``Regular exercise prepares the heart for these stresses...and decreases the likelihood that the heart will go into a chaotic rhythm under the same amount of stress.''
SOURCE: The New England Journal of Medicine 2000;343:1355-1361., http://www.100md.com
The 12-year study of more than 21,000 men found that those who exercised vigorously less than once a week were 74 times more likely to die suddenly while jogging, playing a racquet sport, or doing heavy yard work than while resting or only lightly exerting themselves.
In comparison, men who exercised at least five times a week were only 10 times as likely to suddenly die during the heavy exertion. The findings are published in the November 9th issue of The New England Journal of Medicine (news - web sites).
The overall risk of sudden death during exercise is extremely low, according to Dr. Christine M. Albert, from Brigham and Women's Hospital in Boston, Massachusetts, and colleagues. The authors note that the findings should not discourage sedentary people from beginning an exercise program.
``The benefits of exercise on heart disease clearly outweigh the small risk of sudden death during an episode of vigorous exertion described in our study,'' Albert told Reuters Health in an interview. She pointed out that the risk of sudden death during vigorous exercise was 1 in 1.51 million episodes of exertion.
``To obtain the benefits of exercise while minimizing the risks, one should exercise regularly rather than sporadically, and gradually build up to a vigorous exercise program,'' she said.
While the way that exercise leads to sudden death is not entirely clear, Albert suggested that exertion results in the release of adrenaline, a hormone that lowers the threshold for irregular heart rhythms that can precede heart attack. Or, it may be that exercise results in increases in heart rate and blood pressure, which stress the heart.
``Both of these effects are greater in individuals who do not exercise regularly,'' Albert noted. ``Regular exercise prepares the heart for these stresses...and decreases the likelihood that the heart will go into a chaotic rhythm under the same amount of stress.''
SOURCE: The New England Journal of Medicine 2000;343:1355-1361., http://www.100md.com