Endurance’s Increased Stamina Effect
Like Vigor, you’ll start out with the Endurance trait when you create a new character. Fairly important as well, but slightly less so. Having a larger pool of Stamina means you can run longer and dodge more times in quick succession, before your character gets too tired to do so.
Keep in mind, you wont regenerate Stamina while running and wearing heavier armor will make you use more of it when performing a stamina costing action.
Your base pool of Stamina before modifiers is 100, so netting the level 20 bonus of +50 points (150 total), means a 50% increase in how long you can run and dodge for before resting momentarily.
How to Find the Endurance Trait
Every character starts with Endurance at level 1 when starting a new game, along with the Vigor trait that increases your character’s health.