Department of General and Applied Kinesiology, Faculty of Kinesiology, University of Zagreb, 10 000 Zagreb, Croatia.
Department of Sport Motorics and Methodology in Kinanthropology, Faculty of Sports Studies, Masaryk University, 62 500 Brno, Czech Republic.
Int J Environ Res Public Health. 2022 Dec 13;19(24):16710. doi: 10.3390/ijerph192416710.
Although excessive load carriage results in biomechanical gait changes, little evidence has been provided regarding its impact on postural sway. Therefore, the main purpose of this study was to determine whether heavier loads have effects on changing foot stability and postural sway in special police officers. Thirty male special police officers (age = 40 ± 6 years, height = 180 ± 5 cm, weight = 89 ± 8 kg) were assessed in four conditions: (1) carrying no load, (2) carrying a 5 kg load, (3) carrying a 25 kg load, and (4) carrying a 45 kg load. Foot characteristics during standing were assessed with Zebris pedobarographic pressure platform. Heavier loads increased the center of pressure (COP) path length and average velocity, length of minor and major axis, and 95% confidence ellipse area, while a decrease in angle between Y and major axis was observed. Relative forces beneath the left forefoot and right backfoot regions decreased and an increase in relative forces beneath the left backfoot and right forefoot was observed. When carrying heavy loads, static foot parameters rapidly changed, especially in COP path length and average velocity.
虽然过度的负重会导致生物力学步态改变，但关于其对姿势摆动影响的证据很少。因此，本研究的主要目的是确定较重的负荷是否会改变特警人员的脚部稳定性和姿势摆动。30 名男性特警人员（年龄=40±6 岁，身高=180±5cm，体重=89±8kg）在以下四种情况下进行评估：（1）不携带任何负荷，（2）携带 5kg 负荷，（3）携带 25kg 负荷，（4）携带 45kg 负荷。使用 Zebris 足底压力平台评估站立时的足部特征。较重的负荷增加了压力中心（COP）路径长度和平均速度、小轴和大轴长度以及 95%置信椭圆面积，同时观察到 Y 轴和大轴之间的角度减小。左前脚和右后脚区域的相对力减小，左后脚和右前脚的相对力增加。当携带重物时，静态足部参数会迅速变化，尤其是在 COP 路径长度和平均速度方面。
