椎間盤啊

https://www.issaonline.com/blog/index.cfm/2016/are-sit-ups-bad-for-you-the-us-military-seems-to-think-so

Sit-ups impose extremely large compression forces on the discs and vertebrae of the spine, especially in the lower back. The U.S. National Institute of Occupational Safety and Health has set the action limit for low back compression at 3300 N and repetitive loading above this level is linked with higher injury rates in workers. Compression readings that surpass this limit are imposed on the spine with each sit up repetition.

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• 多謝，那個地方早上並不疼，就是不能作仰臥起坐，用大勁也起不開，那個地方就開始疼 -xiaoxiao2013- ♀ (0 bytes) () 11/03/2019 postreply 11:54:28