Come into a plank position (the top of a push-up) and roll to your right side, allowing your feet to roll too, so you're balancing on the outside of your right foot, stacking your left foot on your right.
Reach your left arm toward the ceiling and lift your waist away from the floor to make your obliques fire away. Press your left inner thigh up into your right inner thigh; this helps stabilize you even more.
To take pressure off of your wrist, press your left fingertips into the floor. Perform the exercise on both sides of the body.