janie asked: Also I want to know what brands are better….please someone help thanks

sandy asked: I would love to know…..I usually burn around 500 calories when I work out. How does it measure how much calories you burn?

Jessie K asked: Or if older, when did people start using them?
Ooops! No offense to old people!

hi asked: im guessing its not much difference but …i just wanna know