What I did to prepare for log home construction in middle age

[Ellsworth]

Before going back to the physical work, here is what I accomplished first.

1) Lost over 100 lbs in less than 1 year.
2) Re-learned how lift weights.
My PR: After consistently working out for two years... 1 month = 10 lb muscle gain and 4 lb fat
The weight on the bar is not the PR, rather the PR is defined by the process.

Disclaimers: muscle/fat gain determined via before/after Dexa scans.
100% natural lifter, before and during.
After that period I did try SARMs for a short while (something I would discourage if only because of high risk of contaminated/mislabeled products).

Building your own log home involves hard manual labor.
I'd suggest building your muscles and calluses before you start building your log home.
That way if you never start your build, then you're still miles ahead of where you were.

Edited to add:
That said, we've had members start building at age 70+ (person A).
We've had members keep building at age 80 ish (person B, unrelated to person A).
We've had disabled members successfully build.
Doesn't mean it's easy. It means it's doable by all sorts of folks.

Please share what you did to get in shape before your build started.