Three Ways to Sharpen Your Abs | Men's Fitness

Three Ways to Sharpen Your Abs | Men's Fitness: "ailing to add weight to ab exercises and training your core with only one movement are two of the worst mistakes you can make on your quest for a six-pack. The abs do much more than just crunch your torso, and they need to be worked against resistance to activate all their muscle fibers. Below is a plan for training your abs three different ways, and much harder than you’re used to."



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