The body has two types of muscle fibers: Slow twitch (type 1) and Fast twitch (type 2). Fast twitch muscles help us push, pull, and lift objects under a short
(1 second-2 minutes) duration of time. They help us sprint, swing a tennis racket and jump over puddles. Slow twitch muscles are our endurance workers. They sustain workloads for 2 or more minutes, like when walking or running at any distance, gardening, cleaning house or carrying a child through a grocery store.
We are born with a personal fixed number of fast and slow twitch fibers, and the ratio never changes from what you were originally given. This is why some people take naturally to sports and weightlifting, while others can swim or bike for minutes on end. You can, however, strengthen either or both muscle types to meet your goals. Beautifully, yoga uses and strengthens both types of muscle strength. An hour-long practice with spurts of higher intensity requirements treats us to a well-balanced muscular meal.
Go back to your childhood, and compare it to now. What ratio of fast to slow twitch fibers do you think you have? 50:50 makes you the most versatile, but you may never be an Olympian because of the work involved to excel in power OR longevity to match those who were born with it.
Now expand this to be a metaphor for your life. Do you tend to move quickly and powerfully? Slowly and methodically? Or are you balanced? Me personally, I'm probably 65:35 fast to slow. Generally, I have a difficult time doing almost anything physical or mental that requires endurance, but that is why I practice, practice, practice toning those mental and physical slow twitch muscles. Sitting in meditation, walking not running, and contemplating the path before jumping in with flags trailing. This last year in particular, I've been giving my speedy side a rest and letting my slower side rise up to meet. And it feels SO good.
Being authentic to ourselves is important, and maintains diversity, but calling in support from the other end of the spectrum brings greater ease and more versatility. Consider, in what ways can you use your body to balance the mental ratio of your life?