just wondering

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so new at this... ok help i just bought a Timex zone trainer HRM with chest strap so i could get a better idea of what i am burning when i excerise. I currently weight 149 , 28 , f, 5' 6... is it really possible for me to burn 348 calories from warm up to cool down on 30 DS doing level 1? or is my HRM off...i always went by what other people said they were burning for a 150 pound person in the range from 150-180 so is it really possible that is almost doubled? I also do zumba toning and since that was the class i did today i remember the calorie burn was 913 i am one of the hardest working (and youngest) in the class so i am thinking that that number is pretty close on days that i do toning with the 2.5 pounds sticks... thanks for your help

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