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http://www.smh.com.au/world/sper ... 20130205-2dvly.html
年轻男人，喜欢运动的，比不喜欢运动的男人多出 73% 的精子。看电视越多，精子越少。 哈佛大学研究表明。
大学男生，每周运动超过14小时的，精子量最多。看电视越多，尤其看电视超过每周20小时的，和运动健将比，精子少一半。所以专家呼吁男士多运动。运动和生殖健康是有关系的。每周做户外运动超过8小时后，精子数量就会上升。越多运动越好。运动的人的精子数量，如果超过每周14小时运动，会多出四分之三（相比不运动男人）。 长期坐着会让男子睾丸温度上升，导致精子数量下降。
New York: Young men who work out frequently have as much as 73 percent more sperm than those who don't, and the more television one watches, the lower the count goes, according to a study by Harvard University researchers.
College-aged men who exercised more than 14 hours a week had the highest sperm counts. Watching TV had the opposite, with sperm counts almost halved for those viewing 20 or more hours a week, according to the study published today in the British Journal of Sports Medicine.
"The message is pretty clear," said Jorge Chavarro, an assistant professor of nutrition and epidemiology at the Harvard School of Public Health. "It makes sense to turn off the TV, and it makes sense to put on your running shoes or sports gear and get out there."
The findings may influence how people think about exercise and men's reproductive health. Past studies looking at sperm counts in athletes focused on highly trained cyclists and long- distance runners, and found that intense exercise by those athletes can reduce sperm. The Harvard researchers said their study participants included all types of athletes such as those who ran or who played soccer, basketball, baseball or football.
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The researchers examined semen samples from 189 men who reported their exercise and TV viewing habits over three months. Exercise was counted as any physical activity that made the subjects "somewhat to very" winded or sweaty.
Sperm counts started to rise after about 8 hours a week of exercise, said Mr Chavarro, the study's senior author.
"More physical activity is better," he said. Those that exercised eight to 14 hours a week had sperm counts 27 percent higher than sedentary men, while working out over 14 hours a week increased sperm count by nearly three quarters.
"That's still quite a bit of exercise, compared to what most people achieve," Mr Chavarro said.
Those watching 20-plus hours of TV a week had sperm counts 44 percent lower than those who watched very little, the study found. That could be because the lack of activity was bad for health, or because being regularly stuck to the couch raised temperature in the scrotum, which can hurt semen production, said Mr Chavarro.
The researchers didn't break down semen quantity by participation in different types of sports, though they may do so in future research.
The good news for TV watchers was the study found little correlation between amounts of exercise or TV viewing volume with sperm quality, meaning that their sperm weren't deformed and could move in the right way.
The study was funded by the National Institutes of Health and the European Union's Developmental Effects of Environment on Reproduction project.
Bloomberg
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鲜肉月饼~ 上图了！（超简易猪油提炼法 #17楼） (2010-9-6) firmoffer 
发表于 2013-2-5 12:49
发表于 2013-2-5 13:31
