Standup paddle board core activator

A standup paddle board core activator and method of use may be provided. One embodiment may include a sloped platform, a sliding footboard, two raised support structures, at least two axels, two rotating arm assemblies, two paddle members with shafts and handles, a tensioner support structure and two tensioners. The sliding footboard may be configured to move along the sloped platform. The rotating arm assemblies may be rotatably attached by axles to raised support structures on either side of the sloped platform. Tensioners may connect to a tensioner support structure and the rotating arm assemblies, applying resistance to the rotation of the arm assemblies about an axis created by the axles. Paddle members may be inserted in the arm assemblies. A user may balance on the footboard, grasp at least one paddle member, and slide the footboard up the sloped platform.