Na Seokhee, Chungi Min Keun, Song Young-Woong
Department of Industrial and Management Engineering, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
J UOEH. 2011 Mar 1;33(1):1-10. doi: 10.7888/juoeh.33.1.
Prolonged work in upright postures (standing and walking) is common in industry and in daily living activities, and is one possible risk factor for low back pain and leg problems. This study compared the reaction forces of four different floor surface conditions (three inner-room floor mats and no-mat) during gait. The reaction forces were measured by both the in-shoe and platform type pressure measurement systems. Six male subjects (average weight = 72.4 +/- 7.5 kg) walked barefoot on the four floor conditions and the data from the two measurement systems were recorded simultaneously. The mean reaction force, two peak forces (heel strike and toe off), and the maximum reaction force measured by the in-shoe type system showed significantly different values according to the floor surface conditions (P < 0.05). The no-mat condition induced the largest mean reaction force of 828.9 +/- 114.2 N, However there was no difference in the reaction forces measured from the platform type system (P > 0.05). All three floor mats induced smaller reaction forces than no-mat, but the mean reaction force and maximum reaction forces (maximum and two peak forces) showed different results due to different thickness and materials. Thus, an appropriate selection of inner-room floor mat according to the biomechanical properties may be useful for reduction of fatigue and discomfort in industrial settings.
在工业和日常生活活动中，长时间保持直立姿势（站立和行走）很常见，这是导致腰痛和腿部问题的一个潜在风险因素。本研究比较了步态过程中四种不同地面条件（三种室内地板垫和无垫）下的反作用力。反作用力通过鞋内式和平台式压力测量系统进行测量。六名男性受试者（平均体重 = 72.4 +/- 7.5 千克）在四种地面条件下赤脚行走，同时记录来自两种测量系统的数据。鞋内式系统测量的平均反作用力、两个峰值力（脚跟触地和脚尖离地）以及最大反作用力根据地面条件显示出显著不同的值（P < 0.05）。无垫条件下产生的平均反作用力最大，为 828.9 +/- 114.2 N，然而，平台式系统测量的反作用力没有差异（P > 0.05）。所有三种地板垫产生的反作用力都比无垫时小，但由于厚度和材料不同，平均反作用力和最大反作用力（最大值和两个峰值力）显示出不同的结果。因此，根据生物力学特性适当选择室内地板垫可能有助于减少工业环境中的疲劳和不适感。
