富裕的民主国家比如美国和加拿大，得一块奥运奖牌的奖金充其量2.5万美金（看这个新闻 http://www.sinoquebec.com/portal.php?mod=view&aid=64677 ）还要交税，并且很多人运动是出于热爱，而不是带着沉重的全国人民的寄托，犯不着为一块金牌而使自己的身体受到伤害。

而在中国，练体育的基本都是来自农村的苦孩子，并且从七八岁开始就被国家选中没黑天没白夜一年365天整天苦练，唯一一个目的就是备战奥运争金夺银，得一块金牌对她们来说太重要了，为拿那块牌都豁出命了。而拿了金牌，国家省市都给奖励再加上广告代言，摇身一变就是千万亿万富翁，值得铤而走险。

There is also a lot of drug use in track and field.
100M race is notorius for rampant drug use.

Someone put it this way about boxing.  I think the same can be said for other sports.
".......
I think this probably has to do more with economics than race. Boxing is a brutal unforgiving sport with a shades of the underworld always peeking in at the sidelines. The primary fighting sport for the last century it has always attracted the poor working man (See Rocky Balboa the movie as a perfect fictional example). Yet in real life, the people who tend to end up in boxing are from a poorer economic background, regardless of color. Mike Tyson was a teenage delinquent with abuse issues. Pacquaio's father left the family at a young age and young Manny was forced to sell food on the streets as a kid. Julio Cesar Chavez, the legendary Mexican fighter, grew up in a train car in dire poverty. He resolved to bring his family out of poverty.
So boxing provided a way for these kids out of their miserable worlds to something better through violence.
......."





When someone is from a poor economic background, sport is one way out to improve the financial future.

That applies to any country.

其实是比谁家的生物工程技术高！