6.1. ANATOMY OF ABDOMINAL MUSCLES 6.14. ABDOMINAL EXERCISES 6.14.1. CRUNCHES 6.14.2 LEG RAISES 6.14.3. STRATEGIES OF ABDOMINAL EXERCISE 6.14.3.1. THE PROPER UPRIGHT POSTURE AND ABDOMINAL MUSCLES 6.14.3.2. VARIETIES OF ABDOMINAL EXERCISES 6.14.3.2.1. BASIC ABDOMINAL EXERCISES 6.14.3.2.2. ABDOMINAL EXERCISES ON A SUSPENSION BAR 6.14.3.2.3. ABDOMINAL EXERCISES ON A BENCH