I've been running steadily for three times a week now, and doing yoga once a week, and through no fault of my own I've gotten faster! And even though I run for peace (of mind), not pace, I can't help but feel pleased.
I like improving and getting better. And I like the fact that my improvement is so tangible. Whereas in motherhood I sometimes feel uncertain whether I'm doing it right, running gives me proof.
And sometimes that's real nice.