Abstract: A water sports board having enhanced flexibility includes an elongated core body having a nose end and a tail end, and top and bottom surfaces defining a curved shape of the water sports board; and an elongated planar stringer disposed on a longitudinal centerline of the core body. The elongated planar stringer has a front end and a rear end, two side surfaces, and top and bottom edges curved to a longitudinal profile of the water sports board, and includes multiple slots on the side surfaces disposed between the front and rear ends of the stringer. The flex pattern of the water sports board can be controlled by selecting desired number, size, shape, and location of the slots of the stringer. The water sports board has an increased rocker and enhanced shock dampening property when exposed to the force of water waves.