How to burn 100 calories.

I don't know, but have you tried to do 40 jumping jacks? That's quite a bit of jumping jacks, especially for someone who's out of shape like myself. I think it might be possible to burn 100 calories that way. I'm no professional though, so it's just a guess.

http://taysinspirations.tumblr.com/post/29137398850/oooh-oooh-i-can-do-this-one-ill-switch-the
If you can't see it, it's 40 jumping jacks, 30 crunches, 20 squats and 10 push ups.

I was just looking online and i came across this?? This can't be true can it?
Can you really burn 100 calories from that?

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