But what really matters for impact injury is how much area that force is being applied to, or why you should lie on a bed of nails, not do a headstand on one.
但是对于冲击损伤真正重要的是施加力的面积,或者为什么你应该躺在钉子床上,而不是头倒立。
英语百科
Head stand
(重定向自Headstand)
The head stand is a pose that is an inversion posture of standing head down. The technique is used in different settings such as yoga, breakdancing and beginner gymnastics.