Robyn, you are taking the same approach I am. It's easy (well, relatively)
to get high mileage when the only thing you do is bicycle. But when you lift weights, walk, jog, stairstep, etc at the same time, well, there is less time to ride the bike.
I am sure you are right that age is a factor.
I read that a 60 year old woman can only build 1/2 as much muscle as a 20 something. so we have to work harder to get where we get to.

I can't take too many days off this month since it's ride to work month but i made a conscious effort this morning to slow down and played waltzes in my head instead of Marchs today.

going home i will be alone so it will be even easier to be pokey