GTA 6 is bringing back a feature from San Andreas and other Rockstar games that is generally well-remembered despite being one of the worst parts about living as a human being in real-life: if you eat a lot and don't exercise, you'll get a big, old, round tummy, and people will expect you to giggle when they poke it.
OK, that last part isn't true, but it has been confirmed that your character in GTA 6 will have a body that changes based on your eating, exercise, and sleep habits. Revealed in an early deep-dive on GTA 6 published by Dazed, you'll get chubby if you eat too much, chiseled if you exercise enough, and visibly worn out if you go too long without sleeping.