Improper way of working out may do more harm than good

... injuries and increases overall fitness because of the use of many different muscles," said Liberman. "For example, do yoga on Monday, running on Wednesday and weight lifting on Friday." "It's important to pay attention to workouts," Harris said. ...

http://www.news-medical.net/news/20131228/Improper-way-of-working-out-may-do-more-harm-than-good.aspx