a Department of Health and Physical Education , The Education University of Hong Kong , Tai Po , Hong Kong.
Ergonomics. 2019 Apr;62(4):537-547. doi: 10.1080/00140139.2018.1552764. Epub 2019 Jan 16.
Measurement of postural stability is crucial for identifying predictors of performance, determining the efficacy of physical training and rehabilitation techniques and evaluating and preventing injuries, particularly for heavy load carriage in hikers, mountain search and rescue personnel and soldiers. This study investigated the effect of load distribution on postural stability in an upright stance using backpack and double pack loads under conflicting or impaired somatosensory, visual and vestibular conditions. The sensory organisation tests were conducted on 20 young adults before and after a 10-min level walking exercise. Young adults' ability to use inputs from somatosensory and visual systems to maintain postural stability was significantly reduced following a 10-min walking exercise with a heavy backpack (30% of body weight), whereas no significant changes were observed for double pack carriage. Thus, the distribution of heavy loads to the front and back provides superior balance control compared with back-only loading. Practitioner summary: This study investigated the effects of heavy (30% of body weight) load distribution on postural stability after a 10-min walking exercise. Backpack carriage significantly reduced postural stability, whereas there was no significant effect under double pack loads. Distribution of heavy loads on the front-and-back is desirable for superior balance control.
姿势稳定性的测量对于确定运动表现的预测因素、评估和预防损伤至关重要，尤其是对于徒步旅行者、山地搜救人员和士兵等需要背负重物的情况。本研究调查了在冲突或受损的躯体感觉、视觉和前庭感觉条件下，使用背包和双背包负载，对直立姿势下的姿势稳定性的影响。在进行 10 分钟水平行走运动前后，对 20 名年轻人进行了感觉组织测试。在进行 10 分钟的重背包（体重的 30%）行走运动后，年轻人利用躯体感觉和视觉系统输入来维持姿势稳定性的能力显著降低，而双背包负载则没有观察到显著变化。因此，与仅背部负载相比，将重物前后分布可提供更好的平衡控制。
本研究调查了 10 分钟步行运动后，重物（体重的 30%）分布对姿势稳定性的影响。背包负载显著降低了姿势稳定性，而双背包负载则没有显著影响。前-后分布的重物更有利于优越的平衡控制。
