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22 Sit Up and Crunch Variations Crunches and Sit Ups have gotten a bad rap in the last few years. They are said to be worthless and even put you at risk for injury. And when designing many of my workouts, I often even opt for other “core moves“ over Crunches and Sit Ups because they give you more“bang for your buck,“ aka they work more, and bigger, muscle groups all at once to not only strengthen your entire core, but also burn more calories.
