Save on income tax & buy this direct from them, not amazon !! I love this vibration plate ! It has many numbered levels from mild to brain rattle. Before I start I set it for 20 minutes, level 20 on the higher vibration. Then I do my thi chi, weights, Squats. When I bend into a squat & hold it i can feel my feet vibrating more. I had an avulsion fracture in my foot after catching my toe on a chair while barefoot. I am 67 years old in decent shape. I was diagnosed with osteoporosis 4 months ago. I am hoping this reverses it. I will find out at my next dexa scan. I also add bone broth to my smoothies & ankle weights when I walk the dogs. I also walk 2 miles or bike 4 miles daily along with yoga. I refuse to take fosamax after reading all the law suits and I don't want to end up with brittle bones that can fracture with just a sneeze. Calcium tablets upset my stomach so I eat my calcium with bok choy & kale ect.