3 Swiss-Ball Plank w/ Leg Raise
Sets: 2 Reps: 12 Tempo: 311 Rest: 60 Seconds
Rest your forearms on a Swiss ball and extend your body behind you so that it forms a straight line. Raise one leg off the floor behind you and into the air . Reverse the motion to return to the starting position, and then raise the opposite leg. That's one rep.