A Shift weight into right foot, bend right knee, and explosively jump to the left, driving off right leg. Land softly with left knee bent. Repeat the movement in the other direction.
B Bring feet back under hips. Bend both knees and place hands on the ground. Step or jump back into a straight-arm plank.
C Keep hips still as you touch left hand to right shoulder. Then touch right hand to left shoulder. Do 10 shoulder touches (5 each side), then step or jump forward and return to standing to complete one rep (one skater plus 10 shoulder touches).