Your heart brings life for you, the first pumping muscle you have.
Then you are able to breath, to hold momma's hand; to grab bottle for milk; to flip over by yourself; to crawl; to stand up; to walk; to jog; to run; to sprint; to jump; to change direction wherever you want; to take remote or game controller from siblings; to be a hater online; to go anyyou want.
These comes from your muscles, and, your brain and nerve.
You old getting old. You can't go wherever you want, can't even flip over yourself, jump like 1-inch high, chased by someone jogging but you sprinting, can't catch up breath running for 1-mile, see 20 sentence before you want to talk back online, can't hold controllers when you try to switch funnier channel, needs help doing things, then you're on wheelchair, you probably shit yourself all the time waking up or sleeping cause you can't reach toilet in time, choked while swallowing water of your own.
What life bringspredictable, things even shitties always happen, just like the heart always pumping inside of you. But you can be a better you by being a do-er.
So go to GYM, to workout, it won't bite you. But bringing back a better you.