Gym training
Spend Stamina to raise Brawn, Endurance, Agility and Cunning permanently.
Each training set costs 10 Stamina. Gain = Stamina spent × (current stat × 0.0001 + 0.025), so stats grow faster as they get bigger.
Brawn raises damage, Endurance reduces damage taken, Agility and Cunning decide accuracy and dodging. Perk and talent bonuses change your fighting stats but never your Gym totals.
Every 10 Stamina spent also earns 1 XP.
In the game: Gym