(INDEPENDENT) — Men who watch more than 20 hours of television a week risk halving their sperm count, researchers warn.

A sedentary lifestyle can have a major impact on a man’s ability to reproduce, the research found.

And while regular, vigorous exercise was shown to boost sperm count, excessive television-watching can counteract the positive effects of physical activity.

The study, published by the British Journal of Sports Medicine, looked at the lifestyles of 189 healthy men between the ages of 18 and 22, over a three-month period, to establish a link between environmental factors and semen quality.

  • Text smaller
  • Text bigger
Note: Read our discussion guidelines before commenting.