My friend has one of these
http://www.competitiveedgeproducts.c...11&affiliate=4
in her living room and she exercises on it while she watches tv. (Not this exact one, but it's a similar device)
I just read an article that says you can use it while you're checking your email, etc. I would assume that means sitting down? Would I be able to use this during working hours? I know it wouldn't have the same effects as doing it while standing, but would it have any effect at all? Would it harm my knees? Other joints? I just want to know if it's too good to be true.