Too much sport 'may be bad for teens' health'

Teenagers have long been told that being active and taking part in sports is good for their health. But new research suggests that too much sport for teenagers could negatively impact their well-being just as much as too little sport.The US Department of Health and Human Services recommends that young people aged between 6 and 17 years carry out at least 60 minutes of physical activity a day, equating to 7 hours a week.