SPRI Plyo Jumping Fitness Boxes Used in plyometrics training to produce fast, powerful movements Improves strength, elasticity and innervations of muscle and surrounding tissues to jump higher, throw farther or hit harder Ideal for forward, lateral, and other plyometric jumping drills Use taller boxes in combination with shorter boxes for a variety of drills such as, high jumps with step downs, and progressive height jumping Available in multiple heights for developing reaction time and overall explosiveness