To me, exercise is compounding in action. Each workout may feel small in isolation, but like interest accruing, the benefits multiply invisibly over years. Extra vitality today, resilience tomorrow, and ultimately, more time across decades.
I was adamant on using one of those health/exercise tracking devices, mainly out of distaste of our modern habit to be constantly in the know of everything, but I gotta say, since I've started using one, it's just so satisfying seeing the accumulated numbers over N months or even years!