School of Physical Education, Shaanxi Normal University, Xi'an 710119, China.
Sensors (Basel). 2024 Sep 4;24(17):5748. doi: 10.3390/s24175748.
The objective of this study was to assess the concurrent validity of the Kunwei force plate system in relation to variables during a counter-movement jump (CMJ) task, in comparison to the Kistler in-ground force plate system, which is considered the "gold standard".
In a single testing session, the Kunwei force plates were placed directly on top of the in-ground Kistler force plate. This allowed for the simultaneous collection of vertical ground reaction forces from 30 participants (male, age = 22.8 ± 2.8 years, body mass = 74.3 ± 12.3 kg, height 178.2 ± 4.6 cm) during CMJ tests. The consistency between force plate systems was assessed using ordinary least products regression (OLPR) with bootstrapped 95% confidence intervals and the Interclass Correlation Coefficient (ICC).
There was no fixed or proportional bias in the CMJ variables measured between the force plate systems. The variables exhibited a strong correlation across the force plates during the CMJ task (ICC > 0.950, < 0.01).
The findings of this study indicate that there was no statistical difference between the Kunwei and Kistler force plate systems when evaluating common CMJ strategy and outcome variables, which are considered the gold standard. Hence, the Kunwei force plate can be regarded as a reliable substitute for the established industry benchmark in evaluating the force-time characteristics of the CMJ. Researchers, athletes, and coaches have the option to utilize this affordable and portable choice as a substitute for the more expensive laboratory-based force plate system. This alternative allows for the precise measurement of CMJ performance and force-time variables.
本研究旨在评估 Kunwei 测力板系统在与反跳（CMJ）任务相关变量方面的同时效性，与被认为是“金标准”的 Kistler 落地测力板系统进行比较。
在单次测试中，将 Kunwei 测力板直接放置在落地式 Kistler 测力板上。这允许同时从 30 名参与者（男性，年龄 = 22.8 ± 2.8 岁，体重 = 74.3 ± 12.3kg，身高 178.2 ± 4.6cm）的 CMJ 测试中收集垂直地面反作用力。使用普通最小二乘回归（OLPR）和bootstrap 95%置信区间和组内相关系数（ICC）评估测力板系统之间的一致性。
在 CMJ 变量的测量中，两种测力板系统之间没有固定或比例偏差。在 CMJ 任务中，变量之间表现出很强的相关性（ICC>0.950，<0.01）。
本研究的结果表明，在评估被认为是金标准的常见 CMJ 策略和结果变量时，Kunwei 和 Kistler 测力板系统之间没有统计学差异。因此，Kunwei 测力板可以被视为评估 CMJ 力-时间特征的可靠替代品，该系统已被确立为行业基准。研究人员、运动员和教练可以选择使用这种价格合理且便携的替代方案来替代更昂贵的实验室测力板系统。这种替代方案可以精确测量 CMJ 性能和力-时间变量。
