

If you want to try teens with normal adult metabolism, you might want this mod's Underweight Teen Fix feature. If you've noticed that your teens typically end up at low fat by the time they become adults, regardless of exercise, this will be why. Sims modder Candyd discovered that in an unmodded game, teens have a modifier applied to them that halves all of their fat gains, but has no effect on their fat losses. If you'd like your sims to be able to grow and change into a wider variety of body shapes than the base game allows, you might want the Expanded Fitness Limits feature. Using this mod's No NPC Fitness Change feature can solve this issue while still letting your played sims be affected by fitness while you are playing with them.

If you switch households a lot, this can affect your own played sims while they are out of your control. If you play on longer lifespans, or with aging off for non-played sims, this problem becomes worse.

This can lead them to quickly get extreme bodies, if most of their on-screen time is spent exercising or eating. In an unmodded game, the background sims that eat from food stalls and go the gym will have their fat and muscle change from the things they do while in your neighborhood. If you play on longer lifespans, or would like a subtler fitness feature, or like the idea of sims' bodies changing more realistically, you might want this mod's Fitness Changes Multiplier feature to slow things down.
