I am in great shape.

The honest test of condition has very little to do with a mirror. It is whether you can get up off the floor without using your hands after twenty minutes down there with a toddler.

Or carry a case up to a platform. Or still be reasonable company at the end of a long day. Shape, in the sense that matters, is the capacity to do the things your particular life keeps asking for.

Measured that way it is specific, it is improvable, and it is nobody else's scale. What did your body do this week that would have been harder a year ago?