Running. . .
This is an interesting post to me, David. . .
Is this whole thing a metaphor, or are you really running a 5k and asking for advice about it in the "New to Poly" section of a Polyamorous Forum website?
My advice to you (about, literally, running) is to train on your own and set aside training time with her as well until she is caught up to you, so that you can continue to pursue your own goals while being a part of her progress.
Unless this isn't about running at all. . .
Illegitimus Non Carborundum