calculating calories burned

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So, normally I do 30 minutes of circuit training and it says I burn 90 calories......ok......tonight I got through my workout in 22 minutes and enetered that and it says 289 calories burned. WTF?

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  • suzihead
    suzihead Posts: 14
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    seems like a big leap. is it saying you've worked harder because you'vve done it in shorter time