From Brightsurf:
Amsterdam, The Netherlands: The high-intensity training undertaken by triathletes has a significant impact on the quality of their sperm, the 25th annual conference of the European Society of Human Reproduction and Embryology heard today (Monday 29 June). Professor Diana Vaamonde, from the University of Cordoba Medical School, Cordoba, Spain, said that the triathletes who did the most cycling training had the worst sperm morphology.
Professor Vaamonde's team has previously shown that both high exercise intensity and high exercise volume may be detrimental to sperm quality. They decided to take a more profound look at the sportsmen who seemed to show the greatest alteration - the triathletes - and assess the correlation between the volume of training in each activity and sperm quality. Of the three modalities, only cycling, the activity for which triathletes undertake the most training, showed a clear correlation with sperm quality. The more cycling training the sportsmen undertook, both in time and kilometres, the worse their sperm quality became.
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