You name it and it's a challenge. I turned 76 this year and I still exercise by using the swim pool, recumbent bike, rowing machine, light weights, the big blue exercise ball and walk my dog rain or shine. I have a few health issues, of couse, but there's a big pay off for those who keep right on truckin'. It has to be that way unless my/your health is really bad. Even then couldn't we do "finger pushups"? Oh, we could do isometrics, right?