Contributor(s): Author: Dr John Bergman Arthritis reversal is more about human potential. On doing research for this book I studied several body-building groups. I found one in Japan where the minimum age is 75 years. That's right; you have to be 75 years old to join. A lot of people think that as we age we're supposed to break down, and that's not true. If you don't drive a car, the car is going to last a long time; but if you don't drive a body, it's going to break down early. With human beings, the more we use our body, the longer it works.