Exercise Description: AB Ball Crunches

Specs: Muscles Worked: The primary muscles worked during machine crunches are the Upper Abdominals. Secondarily muscles used are the Lower Abdominals and the obliques.

Instructions: 1) Sit in upright position on flexaball with feet flat on floor. 2) Walk feet forward allowing flexaball to roll underneath body until it is positioned on lower to mid-back region. Raise hips slightly to create a “table top” position parallel to floor. 3) Place hands behind head with elbows back and out of sight (but don't pull on head). Head should be in a neutral position with a space between chin and chest. 4) Leading with the chin and chest towards the ceiling, contract the abdominal and raise shoulders up. 5) Return to start position. 6) Remember to keep head and back in a neutral position. Hyperextension or flexion of either may cause injury.