Ha, to the breast feeding correlation. Yes, I was the evil one who didn't breast feed. No correlation to cycling ability in this family. One kid was #5 junior racer in the US 2 years in a row and the other is quite a competent cyclist after starting at age 27...
Seriously, I don't feel old in many ways at age 56. I know I'm in better shape than 95% of people my age. But still, I need a lot more recovery, babying, and attention to many parts of my body that I could abuse when I was younger. And my speed is not what it was 2 years ago. If I train more, harder, etc., then I just open myself up to more injury and illness. The goal is to keep riding and be healthy until I keel over.