When you throw a punch, drive a golf ball or launch a football down the field you use rotational core strength, and that's something you won't achieve by limiting your core training to simplistic linear moves such as sit-ups and crunches.
RUGGED ROTATION Rob Fitzgerald Joe Weider's Muscle & Fitness; Apr 2010; 71, 4; Docstoc pg. 206 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.
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