The adapted SUP seat is designed to enable safe participation in stand-up paddleboarding from a seated position for individuals with physical limitations or reduced balance. Securely mounted to the board, it provides enhanced trunk support and promotes a stable and functional posture during the activity. Depending on the model, it may include a rigid or semi-rigid backrest, adjustable straps, and multiple anchoring points to ensure secure installation. It enhances on-water stability and supports inclusive participation in paddle sports.