I've been told that the 1/2 hour Curves workout is equivalent to a 1.5 hour workout in the gym. Something about the cardio in between the weights and the hydrolic weights. The quote was: "If you are in the gym and doing it correctly, to work out all your muscles and include proper rest between each exercise it would equal at leat 1 1/2 hrs. With circuit trainng, it is just jammed together. Many advanced athletes use this principle. Of course on a more intense level."
That really didn't sound right to me, but could it be a fact? If so, how?