17 pull-ups is incredible!
At the State Fair, here in MN, there's an Army booth 'area' where the challenge is for anyone to be able to do 20.
If you accomplish this feat, you've earned yourself a medal 🏅.

I'm in my 40's too; I'm trying out a dietary and supplement protocol to see if I can increase my natural testosterone levels. All the details are on my blog here on Steemit, testing my blood in June to see if what I'm experimenting with shows a clinical difference in two months.

The last sentence in your post tells me you would benefit...

Lately I feel like I'm slowly changing into a werewolf... 🤗 🐺