Step by step instructions
Stand to the left of a box with feet hip-width apart and arms by sides.
Bend knees and lower into a squat position, swinging arms back by hips in preparation for jump. Jump up, rotating body a quarter turn mid-air to land on the center of the box in a squat position with arms in front of body for balance. Jump back off the box to return to start position. Complete the prescribed number of reps on both sides.