Neddysmith
Standard kunce
If she is not interested it does not matter what you do, she will not do it full stop.
My missus refuses to exercise no matter what, she will come up with the most random excuses to not do it, as soon as the time to exercise comes around she will start washing up, vacuuming, making beds, dusting, pretend to be sick, have a head ache, start cleaning the kids rooms, sorting out socks, do ironing etc etc you name it and she will come up with it.
It annoys the crap out of me but nothing I can do, we have had countless arguments about this, and I have a feeling if it continues it might just be our (her) undoing in the next few years.
So I suggest if it annoys you as much as it annoys me move on now and get a partner that shares your interests.
Fark, wish my missus would start cleaning every time I went to work out......would not care 1 bit if she worked out or not, at least the house would be clean.