The plyometric box jump requires fast and powerful movement by rapidly contracting muscles to elevate the body off the floor and onto the box. Plyometric box jumps not only improve power and strength, but they also burn a significant amount of calories when done in higher sets. Box jumps are a full-body function movement that not only engages fast-twitch muscle fibres in the legs but also require the explosive use of the hips as well as core utilization of many CrossFit workouts.