Bench jack knives! One of my favorite ab exercises for developing the abs! This exercise is all about the squeeze and contraction! The harder you squeeze and contract the muscle the more activation there is going to be. The more activation there is the more stress and tension is applied to the muscle which leads to greater muscle hypertrophy! For my full Extreme Abs workout which is included in my 12 week transformation program visit my website! | Josef Rakich Fitness
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