椎间盘啊

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.

所有跟帖： 

• 多谢，那个地方早上并不疼，就是不能作仰卧起坐，用大劲也起不开，那个地方就开始疼 -xiaoxiao2013- ♀ (0 bytes) () 11/03/2019 postreply 11:54:28