I find at age 72 I am actually playing more and more. I understand the energy level does change with age, but I exercise every day and watch my diet. That goes a long way to keeping fit and feeling as well as you can as age advances. I find musically I am more interested in learning than ever. I have not been, however, a giging musician all my life. I played in my mid twenties at lounges and supper clubs, but stopped in my thirties. At my age now music is something I look forward to doing every day. I think as life goes on you do need something to look forward to when you get up every morning.