How about you? :D
Nah. My dad was in great shape well into his 60s and well, my mum died of cancer before she was 60. I was born when my dad was my age now - so he was in pretty good shape :) Better than all of the kids at comparable "middle" ages at least.
In specifically anything?
In whatever it takes to improve in areas that matter! There are lots of them. A well-rounded balanced life, should take care of us adequately, right?