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並前往https://www.military.com/military-fitness/sit-ups-crunches-planks-knee-ups-evolution-core-fitness-testing

Sit-Ups, Crunches, Planks, Knee-Ups: The Evolution of Core ...

We've moved on to bent-knee sit-ups, to crunches and now to the plank pose or hanging knee-ups (depending on your military branch). From the first full twisting ...

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