A SWITCH KICK
Stand with feet shoulder-width apart, arms bent, hands by chin. Jump as you kick left foot forward. Then switch, kicking right foot forward after landing. Continue alternating as quickly as possible.
SCALE DOWN Instead of jumping, step forward, snapping kick out to front. Return to start. Switch sides, repeat.
B QUARTER SWITCH TO DOUBLE LUNGE
Stand with feet hip-width apart, knees slightly bent. Jump up, doing quarter turn to left, landing with soft knees. Jump back to start. Jump up, landing in a lunge with left leg forward, bending both knees to 90 degrees. Repeat lunge jump, switching legs mid-air to land with right leg forward. Return to start. Repeat sequence, turning right. Continue, moving as quickly as possible.