Jumping jacks as cardio?

Yes you would burn about 180 calories from 20 minutes of jumping jacks.It doesn't make a big difference if you do them all at once or break it up.

i love jumping jacks they work very well, i workout everyday and also do mma i am also a us soldier in the army national guard, i used to have a belly but since working out i now almost max out on all my army physical fitness tests, this is what i do. decrease intake and increase outake, i try to eat meat on my plate only the size of my fist and fill the rest of my plate with greens and rice and second dishes. eating healthy is a main factor like choosing carrots and ranch instead of chips. mainly when i workout as far as cardio goes, jumping jacks are good but what i find helps me loose weight the most (since cardio helps you lose weight more than anything) is speed ropes, as in a jump rope, you jump rope for 2 minutes everyday before you workout to get your heart rate up and you switch off left foot and rigth foot after the first minute, and then go for a run. i owe my weight loss to running honestly. i run 1.6 miles every other day hard and when i'm tired i don't walk i at least jog really slow and i've lost 8 lbs from two weeks of constant running and speed ropes. also crunches help your abs which loose weight in your stomach. i use an 8lb medicine ball and crunch from chest to my knees about 100 times but you should start lower and build up i started at 20 about 2 years ago lol. you just need to push yourself because its uncomfortable to workout. my quote that i live by is "i never said it would be easy, i said it would be worth it" and it is thanks to my six pack now lol.

really weight loss exercise works. I also love jumping jacks and i do around 125 jumps an hour to lose my weight.