One of my friends called and we talked about a lot of different things. One of them is using elliptical machine. She said that using elliptical machine is less stressful on your knees and back. Elliptical machines offer various advantages than any other machine exercise. I found this great website ellipticalmachinesguide.com. In this website you can read more about elliptical machine reviews, it’s pros and cons of each kind. So, check out this website and see if you like it.