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在实验室模拟条件下,研究着陆冲击力与着陆冲击时间的关系。被试者为3名年轻健康的男伞兵。当其负荷26.5k或无负荷,分别从1.0,1.5和2.0m的平台上跳下时,用高速摄影法记录他们身上的标记。计算结果表明:(1)作用在各活动节段上的着陆冲击力,随着陆冲击时间的延长而减少,作用在足部的着陆冲击力峰值与着陆冲击时间亦有相同的关系;(2)着陆冲击时间为0.08～O.26s时,上述诸力与其在0.08s时的值相比,减少40.6～64.1％;(3)作用在足部的着陆冲击力峰值与着陆冲击时间的关系曲线,与其回归方程的曲线相比,非常接近。
Under laboratory simulation conditions, the relationship between landing impact and landing impact time is studied. The subjects were 3 young and healthy male paratroopers. When their load 26.5k or no load, respectively, from the 1.0, 1.5 and 2.0m platform jumped down, using high-speed photography recorded their body mark. The results show that: (1) The landing impact force acting on each active segment decreases with the extension of land impact duration, and the peak landing impact force acting on the foot also has the same relationship with the landing impact time; (2) When the landing impact time is 0.08-0.26s, the above-mentioned forces decrease by 40.6-64.1% compared with the value at 0.08s; (3) The curve of the impact peak landing force and landing impact time on the foot, Compared with the curve of regression equation, it is very close.