zumba/dance caloris - which is right?

shaybethxo

so i do about an hour of just dance and zumba on the wii, and according to http://www.zumbacalories.com/ i have burnt 432 calories on zumba and converting sweat points to calories, i burnt 476 calories. but this seems a hell of alot! i sweat and i ache, i put in a lot of effort. no the problem is that MFP says that i've only burnt 429 altogether. argh!
any help?

edit: spelt calories wrong in the title - cringe. sorry!