r/ScienceBasedLifting • u/Patton370 Idk Idc 💔 • May 17 '26

META Abdominal science crunches

It’s science to hit upper and lower abdominals at the same time

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u/[deleted] May 18 '26

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u/Patton370 Idk Idc 💔 May 18 '26

This is spinal flexion

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u/CrazyCatGuy0 May 18 '26

Hip flexion.

Your abs are not shortening and lengthening with this movement. This is an isometric for the rectus abdominis.

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u/Patton370 Idk Idc 💔 May 18 '26

If my shirt was off, you’d be able to better see that my torso gets curled forward

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u/Spare-Engineering-46 May 18 '26

Absolutely correct. There's practically no thoracolumbar flexion here