I watched the Apollo missions live

Dang, you make me feel young! (I saw a couple of them live).

I hear ya. I’ve reached an age where “pacing yourself” is a thing. Dammit.

I like to hike, but… I know where I’m going, I take sufficient gear (stuff in case you get stuck out there, dense emergency food, plenty of water, warm gear, etc, etc), and pace myself. Altitude kicks my ass these days. Sigh.

The big one is I refuse to do this stuff alone. Always have a hiking partner. Something as simple as a minor ankle twist can make for a bad (or deadly) time.