NOHrD Tria TrainerTria Trainer is where contemporary, minimalistic design meets variety! This best describes the unique TriaTrainer. In a closed position the TriaTrainer serves as the perfect abs and core trainer. Unfold one side into first position and convert the chair into a semi bench for working your back muscles and glutes. The Three in One Advantage Abdominal Trainer, Back Extension Bench and Weight Bench Three in one In a closed position the TriaTrainer serves