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polar HRM
need some help please.
recently bought a F6 polar heart rate monitor. After running i have checked the amount of calories burned but when i compare this to mapmyrun.com the reulsts are very different. For example a half hour run about 2 miles showed 400 calories burned on my HRM but acording to maymyrun.com it was 220 calories.
Can some one let me know why this is?
many thanks
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