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?
Have 30 minutes to workout? Try this: 30 exercises for 30 seconds each, resting 30 seconds in between. Print it out, and take it to the park! Just grab a set of dumbbells or resistance bands. harder-better-faster-stronger-healthier-health-fit work-it-out