This is a challenging exercise to do that burns major calories and tightens your legs & butt. The main thing to focus on is to keep your upper leg and lower leg at 90 degrees. For example, your right leg is forward: the right thigh should be 90 degree to the lower leg. Use your arms for momentum. Keep your shoulders back and down. Exhale as you explode upward! Do as many split jumps as you can in 1 minute. Rest. Repeat 3 rounds.