Landing Technique Effects on Lower-Limb Biomechanics During Half-Squat Parachute Landing.

IF 0.8 4区医学 Q4 BIOPHYSICS

Aerospace medicine and human performance Pub Date : 2026-06-01 DOI:10.3357/AMHP.6814.2026

Qiao Ye, Huimeng Chen, Binrui Huang, Xianglin Wan, Guangyun Wang

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引用次数: 0

Abstract

Introduction: During a half-squat parachute landing, foot-strike pattern influences joint kinematics and injury risk. This study compared forefoot and full-foot landing techniques to determine their effects on joint biomechanics, impact forces, and landing stability.

Methods: A total of 17 male paratroopers performed both landing conditions. Lower-limb kinematics, ground reaction forces, and surface electromyography were synchronously recorded using infrared motion capture, a force platform, and wireless electromyography. Paired-sample t-tests or Wilcoxon signed-rank tests were applied (α = 0.05).

Results: Forefoot landing produced greater knee (96.8 ± 12.2° vs. 89.3 ± 11.2°) and ankle range of motion (12.7 ± 3.8° vs. 10.8 ± 3.1°), higher peak knee (1206.4 ± 108.7 ° · s-1 vs. 1147.8 ± 88.8 ° · s-1) and ankle flexion angular velocity (223.5 ± 60.1 ° · s-1 vs. 156.5 ± 42.5 ° · s-1), and a longer braking phase (265.0 ± 29.4 ms vs. 246.5 ± 24.7 ms). It also reduced peak vertical ground reaction forces, loading rate, and dynamic postural stability index, and increased time to peak ground reaction forces. During preactivation, electromyography amplitudes were higher for the biceps femoris (0.097 ± 0.066 vs. 0.081 ± 0.071), lateral gastrocnemius (0.304 ± 0.251 vs. 0.130 ± 0.070), and medial gastrocnemius (0.203 ± 0.144 vs. 0.111 ± 0.105). During the braking phase, amplitudes were higher in the rectus femoris, biceps femoris, semitendinosus, lateral gastrocnemius, and medial gastrocnemius.

Discussion: Forefoot landing enhances joint motion, muscle activation, impact attenuation, and dynamic stability during half-squat parachute landing. It may therefore represent a safer landing strategy. Findings should be interpreted cautiously due to the small, all-male sample. Ye Q, Chen H, Huang B, Wan X, Wang G. Landing technique effects on lower-limb biomechanics during half-squat parachute landing. Aerosp Med Hum Perform. 2026; 97(6):435-442.

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着陆技术对半蹲伞降下肢生物力学的影响。

在半蹲式降落伞降落过程中，脚击方式影响关节运动学和受伤风险。本研究比较了前足和全足着地技术，以确定它们对关节生物力学、冲击力和着地稳定性的影响。方法：共有17名男性伞兵进行了两种着陆条件。使用红外运动捕捉、力平台和无线肌电图同步记录下肢运动学、地面反作用力和表面肌电图。采用配对样本t检验或Wilcoxon符号秩检验（α = 0.05）。结果：前足着地时膝关节（96.8±12.2°vs 89.3±11.2°）和踝关节活动范围（12.7±3.8°vs 10.8±3.1°）更大，膝关节峰值（1206.4±108.7°·s-1 vs 1147.8±88.8°·s-1）和踝关节弯曲角速度（223.5±60.1°·s-1 vs 156.5±42.5°·s-1）更高，制动时间（265.0±29.4 ms vs 246.5±24.7 ms）更长。它还降低了峰值垂直地面反力、加载率和动态姿态稳定性指数，并增加了达到峰值地面反力的时间。预激活时，股二头肌肌电图振幅较高（0.097±0.066 vs. 0.081±0.071），腓肠肌外侧（0.304±0.251 vs. 0.130±0.070），腓肠肌内侧（0.203±0.144 vs. 0.111±0.105）。在制动阶段，股直肌、股二头肌、半腱肌、腓肠肌外侧和腓肠肌内侧的振幅较高。讨论：前脚掌着地增强关节运动、肌肉激活、冲击衰减和半蹲降落伞着陆时的动态稳定性。因此，这可能是一种更安全的着陆策略。由于样本量小且全为男性，研究结果应谨慎解读。叶强，陈辉，黄斌，万鑫，王刚。降落伞半蹲降落过程中着陆技术对下肢生物力学的影响。航空航天Med Hum执行。2026；97(6): 435 - 442。

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来源期刊

Aerospace medicine and human performance PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH -MEDICINE, GENERAL & INTERNAL

CiteScore

1.10

自引率

22.20%

发文量

272

期刊介绍： The peer-reviewed monthly journal, Aerospace Medicine and Human Performance (AMHP), formerly Aviation, Space, and Environmental Medicine, provides contact with physicians, life scientists, bioengineers, and medical specialists working in both basic medical research and in its clinical applications. It is the most used and cited journal in its field. It is distributed to more than 80 nations.