Cover model and TEAMOptimum Nutrition Athlete, Rob Riches, shows how he trains to develop and strengthen his core to reveal six pack abs. Filmed just...
AskTheTrainer.com Personal Trainer Michael Behnken, MS, NASM-CPT-PES, CSCS The stability ball side crunch is really not a side crunch. You should be on the ball...
Like the side crunch torso twists work the obliques but with a rotational movement. Resistance is created by momentum rather than leverage alone. Therefore increasing...