Between work commitments, family responsibilities, and the stress of everyday life, we have legitimate reasons to fall short of our fitness goals. That's why, for many, the pre-goal should be maximizing the efficiency of your workout regimen.
원문출처 : http://www.cnn.com/2017/03/29/health/how-much-exercise-metzl/index.html
원문출처 : http://www.cnn.com/2017/03/29/health/how-much-exercise-metzl/index.html