Someone needs a fact checker. This math is so wrong. 1000 jumping jacks is only 500 calories burnt. That's only the calories of one pound of fat, 3500 calories. To burn 1 pound do 7000 jumping jacks. That sounds a bit more reasonable, eh?
Running to Lose Weight - Kick it up a notch with this hour-long treadmill interval workout that will burn around 500 calories and target hard-to-get-rid-of belly fat. This workout to help you lose one pound this week! - Learn how to lose weight running