measuring resting metabolism

I got a Bodymedia armband this weekend and am curious whether I can use it to estimate my resting metabolism. It seems that I burn about 63 cal/hr when I'm sleeping, which is about 1500 cal/day with no activity. Does this sound about right? I'm 42, F, 5'7", 130 lbs. Also, how would this relate to my basal metabolism?

Thanks!

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