Suggest to me a place where I can spend the next two months working out and eating well

"Anywhere," seems the obvious answer.

Specifically I'm looking for a low cost of living area where healthy food options are cheap and gyms are good. I'm in Thailand right now, which almost fits the bill, but hoping a cooler climate/better air quality suggestion will pop up.

I'm hoping to spend a bit of time putting sightseeing on pause to get into better shape.