Vitality?

I took a slog through the woods this afternoon while the flurries were flying. Carrying rocks, marching up hills, performing other exercises. Two weeks ago doing that nearly wiped me out. I was thinking maybe Covid had damaged my cardio vascular system or something. When I arrived back home I was feeling very good. I let the sweat dry and then cooked up a big pot of greens and a couple of turkey burgers. The greens were sauteed in chicken broth mixed up with chopped mushrooms, garlic and scallions. I don't normally do a lot of sauteeing. I wolfed it all down and stood up from the table smiling. At what, I have no idea.