na JJ it increases your heart rate a bunch as well as your blood preasure. but to be honest when they gave the people coke in the same show ( just a different episode ) the heart rate seemed to be at a level that you would reach during a good jog. from what i saw if you dont go way crazy on it youll be alright... **** ive done it and enjoyed the hell out of it but dont go doing line after line. your heart cant handle it.