Improve your body’s ability to perform numerous explosive movements with the NO. 085 3 in 1 Weighted PRO-Plyo Box by Sunny Health and Fitness. Plyometric training has been proven to induce specific neural adaptations resulting in increased activation of motor units to help athletes and recreationally trained individuals improve their explosive performance. This heavy-duty plyo box was developed to give you 3 different heights so you have a plyo box that fits your goals and training level. Supporting up to 440 lbs of weight, the jump box is designed for durability and strength during even the toughest repetitive movement.