Stand with arms bent to sides. Slightly lift heel and bend knee of lead leg.
Lift lead knee high and step forward while swinging opposite arm up. Begin lifting second leg and its opposite arm before planting lead foot. Continue movement on opposite side, alternating quickly between sides.
Land and push off on forefeet.
Pump more slowly without lifting legs as high when beginning.
Pump more quickly and lift knees high, bringing lifted ankle up and over base knee.