At age 70 I have to say that the most annoying phrases that I hear from doctors and physios are "At your age" and "Age appropriate" I am constantly terrified of having a car crash because I don't want to hear myself referred to on the news as "the elderly driver" I am totally convinced that, to a large extent, age is a state of mind. I think that I am as fit now at 70 as I was at 40, maybe fitter because at 40 I didn't exercise regularly. I use two exercise regimes on alternate days :- day 1, 15mins on each of rowing machine, cross trainer, treadmill and exercise bike. day 2 :- prescribed by the physio (age appropriate!) three sets of, 10 squats holding a 10 kilo kettle bell, 10 lunges and four different weight machines the names of which I do not know. I can honestly say, I will never be a gym junkie, I do it because I have to pass that annual medical. It is a chore and takes commitment, but if the alternative is to lose my licence I'll keep doing it.