Exercise Instructions:

  1. Lie flat on the floor underneath a Smith machine bar.
  2. Bend your knees in order to place your feet flat on the ground.
  3. Position the bar at around chest level. Your arms should be fully extended with the bar in its lowest position.
  4. Crunch up by driving through your abs. The bar will move up, your arms should remain straight to limit assistance from your shoulders and pecs.
  5. Come back down to the floor, and reset for the next rep.
  6. I like to lift my butt slightly as I crunch up, tilting my pelvis up towards my abs to create a harder contraction.

Muscles Worked: