Crunches can help you get abs – but they do more than that.
No matter which variations you follow, crunches have the advantage over sit-ups of being able to better target abdominal muscles. "Because the movement is smaller, you can control momentum more," ...
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The major differences between sit-ups and crunches — and which one is best for you
Sit-ups can activate more muscles than crunches, but they may also present a greater injury risk. Working your abdominal muscles is important for more than just aesthetic reasons. Having a strong ...