滑盘
A 45-degree angle was optimal because it would have aided movement, yet would not have been so great so as to expose women to the back pain and risk of slipped discs that can come with excessive spinal curvature.
45度是最理想的,因为这有助于人们行动,但是也有不好的地方,因为如果脊椎过度弯曲,将会导致背痛或者有椎间盘突出的风险。
Wrist and hand fractures, thighbone fractures, slipped spinal discs and concussions were among the acute injuries study participants reported.
参与调查的人员报告,手腕和手部骨折,股骨骨折,脊椎盘下跌和震荡属于急性损伤。
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