@inthehands complete aside, but 111 miles this last week? That's excellent, must be doing wonders for your health.
I haven't regularly ridden since I was a late teen. I'm in a similar middle aged boat and I should really treat myself to that new bike I've been threatening for years. It can't replace the car, we pay lip service here by "sharing the road" with bikers, which I'm astonished doesn't cause more injuries to cyclists. But we've got miles of trails I need to avail myself of.