Performing the: A Step-by-Step Tutorial Cross Jacks
Jump up, and while in mid-air, cross your legs, right over left, and simultaneously cross your arms, right over left in front of your chest.
Immediately jump back to the starting position, uncrossing your arms and legs.
Again jump up, this time crossing your left leg over the right one and left arm over the right one in front of your chest.
Repeat this alternating crossing motion for the duration of your workout, keeping a steady rhythm and maintaining a good posture throughout the exercise.