mutantclown on 05 April 2013
Good info. I already knew that, though. If you do cardio and you're not grasping for air after 5 minutes then you're doing it wrong.
Take a look at this article/video, it's very educational.
http://fitness.mercola.com/sites/fitness/archive/2010/06/26/10-minutes-of-exercise-yields-hourlong-effects.aspx
