Versatile training in a minimalist design: small and elegant, this functional device acts as a classic ab trainer in the closed position. Opened one step further, the training bench transforms into a back and bottom trainer. When fully unfolded, the TriaTrainer then forms a bench for weight training, whereby the integrated foot roll can be adjusted in all positions for optimum support. This stable support can be locked at different heights, making the TriaTrainer suitable for both tall and short people.