Sedentary spermicide—Watching television for more than 20 hours a week is associated with half the normal sperm count, says research from the Harvard School of Public health, Boston, US. In the study, 189 men aged 18-22 years had their semen analysed to investigate the quality of their sperm. They were also questioned on the amount of exercise they did and how much time they had spent watching television over the preceding three months. Those who spent an average of 20 hours a week watching television had sperm counts that were 44% less than did those who watched half the amount.
(Br J Sports Med 2013, doi:10.1136/bjsports-2012-091644)
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