Butterfly Sit-up- Lie on your back with your legs bent and the bottom of your feet pressed together.  Knees should splay out to the side.  Hold a core ball or small dumbbell in your hands and extend your arms overhead.  On an exhale, engage your abdominal muscles and curl your upper body up to a tall seated position.  Your arms should continue to reach overhead.  With control return to your starting position.  Repeat 10-15 times.

Mountain Climbers- Position yourself in a tall plank position with your hands on a core ball or the floor.  Be sure to keep your shoulders directly over your hands.  Brace through your core as you drive one knee in towards your chest.  Extend that leg fully and immediately bring in the other knee.  Repeat for a total of 30 climbers.