Yep, stuff hurts. Some muscle and joint fatigue, some old injuries. Collectively it's called 'old age'. Now you can give up and sit in a rocking chair; or you can carry on doing what you like. It'll still hurt and you'll still get to the same end result over time. I choose to do what I want cause a) I'm stubborn; b) it's more fun.

Old age ain't for sissies!