Donsell

I don't take this as being sarcastic jerk at all. I track my recovery heart rate. I do a workout trying to keep my heart rate in my optimum zone based on my age for an extended period of time. Then I measure it again after 2 minutes of rest. The rate at your heart recovers is one way to measure cardio fitness. Since adding high intensity intervals on the elliptical I've seen improvement. But there are a lot of ways you could do the same thing, even jumping rope.

I like the elliptical because it has zero impact. I have some knee problems from playing football and wrestling when I was younger. Running and stairs bother them so I chose the elliptical.