A device for providing user-support on a stand-up paddle board (SUP) includes a support post having a user-support pad mounted to its upper end portion and a horizontal rotation axle around which the support post is rotatable to a position for use, and to a stored position. The device is configured to be mounted to the SUP with the horizontal rotation axle positioned transversely to a length of the SUP. The device includes a spring component returnably connected to the support post via the horizontal rotation axle, configured to impose a return force on the support post in the stored position.