Side/front arm crossover. Subjects swung both arms out to their sides and then crossed them in front of their chest, while moving forward.
Stand with your feet more than hip-width apart and your arms straight out to your sides at shoulder level (a). Simultaneously cross your arms in front of your chest and jump up just enough to cross your right leg in front of your left (b). Without pausing, quickly reverse the motion and return to the starting position. Repeat, crossing your left leg in front of your right. Continue alternating feet for a total of 10 to 15 reps.