I choose to deduct 1.62 fat points every time a sim is sleeping to counteract this. Using MC Command Center I tracked a sim family's fat value over time and found sims gain on average 1.62 fat points per day if not exercising even though they are not overeating. So I wanted to find an alternative way to make sims burn calories without having to workout. It was then I decided I'm never doing this. The Balanced Calorie Mod consists of more than 500 tuning files that need to be changed and then re-checked after every update. I took a look at the files and immediately understood why. Several modders have taken it upon themselves to keep it updated, but afaik all stopped doing so. In the past, I heavily relied on CandyD's Balanced Calorie Mod, but it is outdated. Every time your sim is sleeping, they'll lose a tiny amount of fatness to simulate a natural metabolism. In order for sims to keep their weight roughly in check without the need for constant workouts, I added a small loot action to the asleep buff.