a School of Kinesiology , University of Michigan , Ann Arbor , MI , USA.
b Department of Biomedical Engineering , University of Michigan , Ann Arbor , MI , USA.
J Sports Sci. 2019 May;37(10):1129-1138. doi: 10.1080/02640414.2018.1545515. Epub 2018 Nov 14.
Ground reaction force measurements are a fundamental element of kinetic analyses of locomotion, yet they are traditionally constrained to laboratory settings or stationary frames. This study assessed the validity and reliability of a new wireless in-shoe system (Novel Loadsol/Pedoped) for field-based ground reaction force measurement in hopping, walking, and running. Twenty participants bilaterally hopped on a force plate and walked (5 km/hr) and ran (10 km/hr) on an instrumented treadmill on two separate days while wearing the insoles. GRFs were recorded simultaneously on each respective system. Peak GRF in hopping and peak GRF, contact time (CT), and impulse (IMP) in walking and running were compared on a per-hop and step-by-step basis. In hopping, the insoles demonstrated excellent agreement with the force plate (ICC: 0.96). In walking and running, the insoles demonstrated good-to-excellent agreement with the treadmill across all measures (ICCs: 0.88-0.96) and were reliable across sessions (ICCs within 0.00-0.03). A separate verification study with ten participants was conducted to assess a correction algorithm for further agreement improvement but demonstrated little meaningful change in systemic agreements. These results indicated that the Novel Loadsol system is a valid and reliable tool for wireless ground reaction force measurement in hopping, walking, and running.
地面反力测量是运动动力学分析的基本要素，但传统上它们受到实验室环境或固定框架的限制。本研究评估了一种新型无线足底压力测量系统（Novel Loadsol/Pedoped）在跳跃、行走和跑步中的现场地面反力测量的有效性和可靠性。二十名参与者在两天内分别穿着鞋垫在测力板上双侧跳跃、在仪器化跑步机上以 5 公里/小时和 10 公里/小时的速度行走和跑步。每个系统同时记录地面反力。比较了跳跃的峰值地面反力和行走的峰值地面反力、接触时间（CT）和冲量（IMP），以及跑步的峰值地面反力、接触时间（CT）和冲量（IMP），分别在单次跳跃和逐步基础上。在跳跃中，鞋垫与测力板具有极好的一致性（ICC：0.96）。在行走和跑步中，鞋垫与跑步机在所有测量指标上均具有良好到极好的一致性（ICC：0.88-0.96），并且在各个测试会话中均具有可靠性（ICC 在 0.00-0.03 之间）。一项针对十名参与者的独立验证研究评估了进一步提高一致性的校正算法，但系统一致性几乎没有明显变化。这些结果表明，Novel Loadsol 系统是一种用于跳跃、行走和跑步中无线地面反力测量的有效且可靠的工具。
