How to Get Six Pack Abs : Crunch Exercises for Ab Workouts

Learn how to do exercises that work out the abdominal muscles, including how to do the bent knee crunch in this free video clip on working out.

Expert: Jacob Garcia
Bio: Jacob Garcia is a certified personal trainer with disciplines from both the American Council on Exercise (ACE) and the American College of Sports Medicine (ACSM).
Filmmaker: Juan-Diego Garcia

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