Exercise: too much is also harmful as too little

Sports have a positive impact for both the physical and mental health. However, benefits begin to decrease after a certain threshold.

The researchers of the University of Lausanne (Switzerland) has interviewed over 1200 people at the age of 16-20 on the habit of sports from February 2009 to January 2010.

The results showed that the maximum threshold below 14 hours per week, then the higher training levels associated with stress and anxiety levels lower, more confident and stronger mind capability.

But benefits decrease in people with the amount of physical activity more than 14 hours per week. According to the experts, then too much exercise can cause harm rather than protect health.

Especially with the teen sports. Health assessment scores are good for is 14 hours per week, but lost interest when the episode too 17 hours per week. Results from a number of biological research has shown that very high levels of exercise can cause inflammation, harmful to the physical and mental health.

"These results highlight the importance of the monitoring activities of minors at the same time closely concerned to the child's health," the researchers conclude.=