When working on flat abs, it is important to pull the abs into the floor during crunches instead of letting them flex upward toward the ceiling. Flatten your abs effectively with a demonstration from a PMA-certified Pilates teacher in thisfree video on core exercises. Expert: Teresa Sciarretta Contact: www.PilatesStudioCity.com Bio: Teresa Sciarretta is a PMA-Certified Pilates Teacher and has completed numerous continuing education workshops including Pilates for Pregnancy and Pilates Protocols for Common Problems. Filmmaker: Max Cusimano Series Description: Working out the abs not only yields an attractive, flatter stomach, but it also strengthens the core muscles for better overall fitness. Practice these core exercises with help from a PMA-certified Pilates instructor in this free video series on abdominal workouts.