Abtastic Abdominals! 1. Oval abs x 20 ea direction 2. Knee to elbows x 20 ea side 3. Leg extensions x 20 4. Sideways scissors x 20 The Swiss ball creates a wobbly surface so that your core muscles are forced to work hard and balance you - giving you an ab workout on top of your ab workout! Give it a shot! Tag a friend to keep you accountable. Song is "I know what you did last summer" by Shawn Mendes and Camila Cabello.