Sprint
Keeps sprint enabled without holding the vanilla sprint key.
Overview
Sprint applies the normal sprint state while your movement allows it. The Allow while settings expand that behavior into situations where vanilla would normally stop sprinting.
Allow while
Using item
Keeps sprint active while blocking, drawing a bow, eating, or using another held item.
Backwards
Allows sprint while moving backward.
Sideways
Allows sprint while strafing without forward input.
In inventory
Keeps sprint active while a screen is open. InvMove is still needed to provide the movement input itself.