The group who spent over 20 hours watching television had a concentration of 44% lower than those who spent the shortest time in front of the screen. Another important factor is physical exercise, according to a study published on-line inspermatozoa the British Journal of Sports Medicine (publication of the BMJ group).
The men who exercise for 15 or more hours a week have a concentration of 73% higher than those who exercise less than five hours a week. However, the study stresses that in all the cases examined, the concentration of spermatozoa spermatozoa was sufficient for the conception of a child.
The quality of sperm seems to have been deteriorating for several decades in many of the Western countries, but the causes of this weakening are not known with certainty. Some scientists suspect that a sedentary life style and lack of exercise are partly responsible for this decline.
According to the authors of the study, “the impact of different types of physical activity on the quality of sperm needs to be assessed, since earlier studies suggested contradictory effects of exercise on the characteristics of sperm”.
Translated by Louise Dawson, 2013
1 Infolettre de Passeport Santé 2013-02-08
*Translation of the BLSQ no 116: QUALITÉ DU SPERME ET EXERCICE