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For men, the health benefits of bicycling may involve a troublesome trade-off. While riding a bicycle burns calories and improves cardiovascular fitness, too many hours on a bicycle saddle can compress the artery and vital nerves leading to the penis.

The result? A risk of erectile dysfunction.

A male cyclist can place a significant percentage of his weight on his perineum, an area between the scrotum and the anus where the nerves and arteries to the penis pass. This pressure -- and a narrow saddle seat -- can injure the arteries and nerves.

Even a young man may lose the ability to achieve an erection, says Goldstein, who pioneered an operation that restores blood flow and sexual potency in 65%-75% of cases.

How much riding does it take to put a man at risk? The Massachusetts Male Aging Study found that the risk was highest among men who cycled more than three hours a week.

The evidence that riding a bicycle can be harmful to men is very persuasive, but it should be kept in perspective.

"If someone comes in and says, 'Should I not cycle because of the danger of erectile dysfunction?' I say, 'You have a 50% chance of developing and dying from heart disease, so your primary focus should be exercise and diet -- the two main components of fighting heart disease.....

from internet sources
Hio ni story mingi sana. People will always find something negative about everything. ..be it eating cake, driving a probox, using a public toilet, using a mobile phone.....etc
 
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