Forty times a second, this clever anti-pedometer takes a reading of the acceleration it experiences while attached to you. In this way it's supposed to be much more accurate in determining how many calories you are burning, instead of trying to attribute a number of calories burned per footstep (which varies depending on walking or running speed, incline of slope, how much you, er, bounce, and how much weight you're carrying).
It's also got a nifty program that comes with it, that conveniently reminds you how lazy you were on Tuesday, and how you barely got up from the sofa. It links to your nutritional intake too, helping you plan meals - and these things together let you know how much you (should) have lost. I guess you've got to be truthful though - you might be able to lie to yourself about that pack of muffins you demolished, but as your calculated and real weight start to diverge - hopefully you'll be guilted out of fibbing! [Sara Wallen]
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From: The feminist reading of a perfectly harmless memory device