Well, I can't check my BP at the regular grocery stores and stuff cause they're too small...even says on them its for arms UP TO 13" in circumfrence. I do know my blood pressure goes up when I'm on, which has always been the case, but I don't think thats out of the norm for most everyone. I went to the dr. for a physical before I started though, and BP was basically 130/80 or something like that. Basically normal.