Sprinter

You are fast on your feet and are less likely to become winded when sprinting long distances, you gain the following benefits:

Increase your Constitution score by 1, to a maximum of 20.

When you Dash on your turn you gain an additional movement speed increase.  This movement speed increase is equal to twice your movement speed after modifiers have been applied.

With a speed of 30 feet, for example, you can move up to 90 feet on your turn if you Dash.

This movement speed increase is only applicable to one dash per turn.