Does it have to be a treadmill? I mostly do the elliptical (ski whatever it's called) since i'm not much of a runner. Just curious if I need to take it up a notch or not.
not it can be also spinning, swimming (probably best since it's full body workout without joint stress) and so on. elliptical is actually pretty good full body exercise from what i heard, if you are happy with it keep doing it
