I'm ramping up from pretty much no exercise to trying to do the 60 minutes 5-6x/week. My question is, how hard a workout does it need to be? Today was my first day, and I did 45 minutes on the treadmill and went 2.5 miles. So I wasn't going very fast...I was a little sweaty but I didn't push myself. Recently I went to a fitness "boot camp" and was really huffing and puffing; feeling like I was going to puke and was sore for nearly a week afterwards! Clearly I'm out of shape. Just wondering, for swaying purposes, if you need to push yourself or how hard you need to work out. Thanks!