For me it is Zumba Gold the low impact, low intensity version. I think keeping moving for as long as you can has to have lots of benefits. It also helps you forget your conditions. Everyone is different and there are many types of exercise out there to try. Tai chi, swimming, dance, a walk in the park. For the less mobile, there are chair exercise classes. I have just heard of a lady teaching Tai Chi near me and she is 93. I thought I was passed it!