Biosphere plank heckle
Pump your core with this one! Set up in the regular plank position opposite your partner. When you're in position, work the ball left and right, forward and back, just enough to keep your partner guessing and adjusting.
photo credit: Sam Forencich www.sameyeam.com
This is not a competition. Rather, the idea is to give your partner's body some movement to work with. This is physical education, not a contest. If you want a more difficult challenge, do it on one foot.
