Are those sit-ups and planks you're doing over and over again becoming a total snoozefest? Does the thought of one more bicycle crunch provoke the biggest of big, fat yawns? And, be honest now: Does that basic ab regime even work for you anymore? If so, great (you go, Glen Coco). But, just in case you need a little ab inspiration (abspiration?), we’ve got the perfect solution to your workout rut. Transform your core with seven of our favorite pro-approved midsection moves — you know, the kind that make you sore in muscles you had absolutely no idea you had.
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