Strength

Strength (Str) represents your character's fitness and physical prowess.

You apply your character's Strength modifier to Melee attack rolls, Damage for Melee and Thrown Weapons, when using a Two-Handed Weapon you add double your Strength bonus, Athletics & Swim checks, (the Skills with Strength as the key ability), Strength checks (for breaking down doors and the like), and Strength Saves.