The primary purpose of this study was to examine lateral deviations in center of pressure as a result of an extreme-duration load carriage task, with particular focus on heel contact. A total of 20 (n = 17 males and n = 3 females) soldiers from a special operation forces unit (body mass 80.72 [21.49] kg, stature 178.25 [8.75] cm, age 26 [9] y) underwent gait plantar pressure assessment and vertical jump testing before and after a 43-km load carriage event (duration 817.02 [32.66] min) carrying a total external load of 29.80 (1.05) kg. Vertical jump height decreased by 18.62% (16.85%) from 0.30 (0.08) to 0.24 (0.07) m, P < .001. Loading peak and midstance force minimum were significantly increased after load carriage (2.59 [0.51] vs 2.81 [0.61] body weight, P = .035, Glass delta = 0.44 and 1.28 [0.40] vs 1.46 [0.41] body weight, P = .015, Glass delta = 0.45, respectively) and increases in lateral center of pressure displacement were observed as a result of the load carriage task 14.64 (3.62) to 16.97 (3.94) mm, P < .029. In conclusion, load carriage instigated a decrease in neuromuscular function alongside increases in ground reaction forces associated with injury risk and center of pressure changes associated with ankle sprain risk. Practitioners should consider that possible reductions in ankle stability remain once load carriage has been completed, suggesting soldiers are still at increased risk of injury even once the load has been removed.

本研究的主要目的是检查极端持续负载承载任务导致的压力中心横向偏差，特别关注脚跟接触。来自特种作战部队的总共 20 名士兵（n = 17 名男性和 n = 3 名女性）（体重 80.72 [21.49] kg，身高 178.25 [8.75] cm，年龄 26 [9] 岁）接受了步态足底压力评估以及 43 公里负载运输事件（持续时间 817.02 [32.66] 分钟）前后的垂直跳跃测试，总外部负载为 29.80 (1.05) kg。垂直跳跃高度从 0.30 (0.08) 下降到 0.24 (0.07) 米，下降了 18.62% (16.85%)，P  < .001。负载峰值和最小中间力在负载运输后显着增加（2.59 [0.51] vs 2.81 [0.61] 体重，P  = .035，Glass delta = 0.44 和 1.28 [0.40] vs 1.46 [0.41] 体重，P  = . 015，Glass delta = 0.45，分别），并且由于负载运输任务 14.64 (3.62) 至 16.97 (3.94) mm，观察到压力位移横向中心的增加，P < .029  。总之，负重导致神经肌肉功能下降，同时与受伤风险相关的地面反作用力增加，以及与脚踝扭伤风险相关的压力中心变化。从业者应该考虑到，一旦负载运输完成，踝关节稳定性可能仍然会降低，这表明即使负载被移除，士兵受伤的风险仍然增加。