My name is Tracy Sharpe. For several months I have being taking the OsteoUp class. I started to see a difference almost immediately. When I took the first class I felt stronger. The same has been true for every class I have taken. I have a knee that I have a screw in. For that reason, I have not felt confident enough to do exercises involving my knee. My knee feels stronger. I cannot say good about OsteoUp. I would highly recommend it.