Originally Posted by
therhodeo
Some of the lifting guys go to it for their cardio and say its not too terribly hard.
It's all in the class and instructor as others have said. I've been to some that are killers. One involved a ten minute simulated climb where every 30 seconds you increased the resistence until you are standing half way through. Then you keep it up until you can't turn the crank anymore. Do that three times!