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Experts say PLANKS are much more effective for your abs than crunches.

That’s because crunches only work SURFACE abdominal muscles. But planks target your entire COREsurface abdominal muscles, transverse abdominal muscles, obliques, and lower back muscles. That helps flatten your belly and pulls in your waist like you’re wearing a corset. Plus, planks are safer than crunches. The discs in your spine aren’t repeatedly bent. And that’s what increases your risk of injury when you do crunches.

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