Cardio kickboxing - 850 to 1000 calories per hour?

oparker20 · Yahoo User

I took a cardio kickboxing class for the first time today. I've been working out/running regularly for 7 years and am pretty fit, so I was surprised it was such an intense workout (I'm not really an aerobics class person). But I have my doubts about the calorie burn that the instructor was claiming.She said that this class burns 850-1000 calories in one hour... um... there is no way. I had my heart rate monitor on, and while I got a great workout (average 75% of max HR, topped out at 89%), I burned around 450 calories. I don't see how someone could burn two-three times that, unless of course they are two-three times my size (I'm 135-140lbs).Is this just a lie, because that drives me nuts. With most people, you tell them that they are burning 1000 calories a class, they are going to go home and eat like pigs. That's how I was when I first joined a gym, until I realized the machine counts exaggerate wildly. Apparently the instructors do as well?I just found this via google: http://www.medicinenet.com/script/main/art.asp?articlekey=50921"Accord ing to a recent study by the American Council on Exercise (ACE), cardio-kickboxing participants can expect to burn an average of 350 to 450 calories per hour and maintain a heart rate at 75% to 85% of maximum, well within the recommended 65% to 85% range for aerobic exercise. An hour-long session is roughly equivalent to an hour of brisk walking or light jogging."Sounds just a tad more realistic than 850-1000!