Re: Not surprised
The cheapest model is a clip on the belt pedometer... which are not as susceptible to rapid wrist movements as the other. Did they give you a flex (cheapest wrist band)?
Side note, I ran a mile an a half in the shower once.
I sold it on eBay because it lost its appeal, thing is I know how active I am during the day, don't need a wrist band to tell me that I didn't walk as far when I've driven to work instead of walking... I can figure that out on my own.