I put up my vibration plate and used it for the first time, today. I can certainly feel it in my hips and my bone-on-bone knee was very noisy, but it did not hurt. My lower back which has been in a constant spasm for over 6 months, feels much better! I could not stay on it very long, but will work my way up! I am hopeful that it will strengthen me, and help my balance. Thank you!