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?
Even on busy days you can find at least 30 minutes to workout. before bed, after work, after school, on your break…etc. It’s just getting the motivation to do it. Here is one of my favorite quick work outs for busy days or lazy days.