I have seen a documentary on TV about the "senior" table tennis tournment/ There was a lady from Australia who is 100 years old and she was still competing. It is very inspirational. You have to be at least 80 to join in the tournament. It took place in inner mogolia in China last year I think. Seniors from all over the world went for the competition and they were really good. Many are in their 90's! I wish I am still skiing in my 80's