A SPIDER LUNGE PLEDGE
Start on floor in plank on palms. Jump left leg forward to outside of left hand as you touch left hand to right shoulder. Return left palm to start, then switch legs (lunge left leg back, right leg forward to outside of right hand) and bring right hand to left shoulder. Continue alternating as quickly as possible.
SCALE DOWN Do entire sequence with hands on small step instead of floor.
B HOT POTATO
Stand with feet more than hip-width apart. Tap left foot in towards midline of body, then immediately step it out to start. Switch sides; repeat. Continue, pumping arms as if you were running and moving as quickly as possible.
SCALE UP Start by straddling step. Tap left foot atop step, then immediately place foot back down to left side of step as you tap right foot atop step. Continue alternating.