I always think of the the general life requirements like you want to be able to carry your suitcase or bagging if you have to run for the plane that you can do it without coughing up along. Pick things up and not get injured. Sprint if you need to. Play a game of frisbee or soccer or or or volleyball, a pickup game at the picnic or something. Uh go for a hike maybe with a kid on your back, maybe with a backpack if you don't have kids.