Hi Tony: The gazelle is the best piece of exercise equipment I have ever used. I have problems with my knees and my neck and can use the gazelle without pain. If anything, it feels better. Using the gazelle, I am able to maintain the weight I have lost, 25 pounds and 12 inches, and have kept it off. I enjoy using the gazelle in my home while listening to music and watching your videos. Gazelling makes me feel better physically and mentally. Yours truly, Susan - Ontario - Canada