4X MUSCLE ACTIVATION - Scientifically designed to engage up to four times more muscle groups than exercises performed on a flat surface. The unstable platform forces your core, stabilizers, and supporting muscles to work harder for more effective full body-training. CORE & FAT-BURNING WORKOUTS Ideal for crunches, planks, squats, lunges, and other high calories burn exercises that strengthen the abs, shoulders, legs, and glutes while helping support weight loss and total-body conditioning.