Abstract: A balance board with variable fore-and-aft adjustability is an apparatus that enables users to perform balance training with a forward-leaning posture requiring different fore-and-aft weight distribution. The apparatus includes a board body, a rail, a first rail support, a second rail support, a rolling fulcrum, a plurality of first slots, and a plurality of second slots. The board body serves as a platform on which the user can stand for balance training. The first rail support and the second rail support enable the attachment of the rail in different settings to practice different postures of markedly varying fore-and-aft weight distribution. The rail enables the board body to linearly roll on the rolling fulcrum. The plurality of first slots and the plurality of second slots enable the adjustment of the positioning of the rail. The rolling fulcrum with an annular groove facilitates the balance training of a forward-leaning posture.