In a recent interview with the British TV show GMTV, Madonna defended her decision to workout to the point of developing man arms. She said that she does it for both health and aesthetic reasons.
Her main argument to keep herself in shape is so that she can wear whatever she wants to on stage. She said that if she's going to hit the stage and "jump around in a pair of hot pants" she better look good.
Point taken, but I'd like to offer an alternate choice to Madonna. You don't have to work out that hard if you're NOT wearing hot pants. Lose the hot pants, gain some more "me" time.
Or, just lose the hot pants because you're 70. The common theme here…lose the hot pants.