Hi Scrap,

I was just thinking about the verti-run. When i attempted a makeshift version of it (which i'm sure is pretty rough and ready compared to the real thing) i didn't have any resistance and couldn't get my heart rate up either.

Still you're moving while you're on it - so you must be working something right?!?! It's not really cardio and not really strength training - unless it works deep internal muscles which you feel less - good for the circulatory system? Allows more efficent pumping of blood by your heart?