Wood Plyobox 20"x24"x30"Plyometric exercises can play a very key role in your fitness routine. Plyometric exercises are high impact exercises that focus on the stretch shortening cycle of your muscles. During the stretch part of the cycle, your muscle lengthens. And during the shortening part, it contracts. Think about what happens when you jump: Your muscles stretch as you jump and shorten as you land. Description Our FitWay Plyo Box is a great way to add some plyometric