I'm the opposite. Good fuel and exercise give me SO much energy, and help me sleep a lot better. And I HATE prepping food in a dirty kitchen, so I'll clean the kitchen, which then makes me want everything else clean to match. And because I'm generally more active now, I hate to sit, so I'll putter, clean, etc at the times I used to just veg on the couch.
I used to be a total slob, and around the same time I started losing weight, I cleaned up my act.

