Someone try this and tell us if you really burn 300 in 15?

Laceylala

http://health.yahoo.net/experts/fitness/burn-300-calories-15-minutes

Because I know how hard I have to push to burn 10-11 cals per minute according to my HRM and I don't believe this too much...

roylawrence87

Considering height and weight difference, I definitely can. It may be different for you.

glittersoul

http://www.myfitnesspal.com/topics/show/53583-kettlebell-calories-burned

KatieM7

Just this morning I burned 335 calories in 20 min. I think it also depends on the exercise that you are doing some are more intense than others and Kettleball looks like one of the more intense.

Just found this article http://www.webmd.com/fitness-exercise/news/20100212/kettlebell-workouts-burn-calaories-fast