I have a new favorite machine. The arc trainer is flippin amazing. It was super difficult at first, i could only stand it for like 5 mins. But now, i stay on it for 30-45mins, and burn between 350 ...

I burn off 400 calories in 20mins on the elliptical.

How many calories you burn is dependant on how much you weigh. The more you weigh, the more cals you burn. So i'm sure you burn more than me. And Alex is right, you have to deduct about 10% off ...

i think the amount of calories you burn has more to do with your calorie intake than anything else. the more you eat the more you will burn if you are exercising.