Professional cyclists should consider freezing their sperm before embarking on their careers, say researchers.
研究人员表示，职业自行车选手在开始正规训练之前，应该考虑先把自己的精子冷冻起来。
They found sperm quality drops dramatically with rigorous training.
研究人员发现，高强度的骑车训练，会导致精子质量大幅下降。
The Spanish study of top triathletes found those who cover more than 186 miles (300km) a week on their bikes have less than 4% normal looking sperm.
西班牙科学家针对顶级的铁人三项运动员的研究发现，这些每周骑车距离累计超过186英里（300公里）的专业运动员，看上去正常的精子数量还不到4%。
At such levels, men would have "significant fertility problems", the European Society of Human Reproduction and Embryology said.
欧洲人类生殖及胚胎学会表示，这样的精子水平对男性而言是种“巨大的生殖损伤”。
