This move targets abs and legs.
Lie faceup on mat with knees bent 90 degrees, legs lifted, calves parallel to floor.
Place hands behind head, elbows out, and crunch up, living shoulders off mat.
Extend legs diagonally up, cross ankles, and extend arms overhead. Holding this position, switch feet over and under each other 8 times. Return to start.
Do 8 reps.