Yingling Vanessa R, Castro Dimitri A, Duong Justin T, Malpartida Fiorella J, Usher Justin R, O Jenny
Department of Kinesiology, California State University, East Bay, Hayward, CA, USA.
PeerJ. 2018 Apr 20;6:e4669. doi: 10.7717/peerj.4669. eCollection 2018.
The vertical jump is used to estimate sports performance capabilities and physical fitness in children, elderly, non-athletic and injured individuals. Different jump techniques and measurement tools are available to assess vertical jump height and peak power; however, their use is limited by access to laboratory settings, excessive cost and/or time constraints thus making these tools oftentimes unsuitable for field assessment. A popular field test uses the Vertec and the Sargent vertical jump with countermovement; however, new low cost, easy to use tools are becoming available, including the iOS mobile application (app). The purpose of this study was to assess the reliability of the relative to values obtained by the Vertec for the Sargent stand and reach vertical jump (VJ) test.
One hundred and thirty-five healthy participants aged 18-39 years (94 males, 41 females) completed three maximal Sargent VJ with countermovement that were simultaneously measured using the Vertec and the . Jump heights were quantified for each jump and peak power was calculated using the Sayers equation. Four separate ICC estimates and their 95% confidence intervals were used to assess reliability. Two analyses (with jump height and calculated peak power as the dependent variables, respectively) were based on a single rater, consistency, two-way mixed-effects model, while two others (with jump height and calculated peak power as the dependent variables, respectively) were based on a single rater, absolute agreement, two-way mixed-effects model.
Moderate to excellent reliability relative to the degree of consistency between the Vertec and values was found for jump height (ICC = 0.813; 95% CI [0.747-0.863]) and calculated peak power (ICC = 0.926; 95% CI [0.897-0.947]). However, poor to good reliability relative to absolute agreement for VJ height (ICC = 0.665; 95% CI [0.050-0.859]) and poor to excellent reliability relative to absolute agreement for peak power (ICC = 0.851; 95% CI [0.272-0.946]) between the Vertec and values were found; Vertec VJ height, and thus, Vertec calculated peak power values, were significantly higher than those calculated from values ( < 0.0001).
The app may provide a reliable measure of vertical jump height and calculated peak power in multiple field and laboratory settings without the need of costly equipment such as force plates or Vertec. The reliability relative to degree of consistency between the Vertec and app was moderate to excellent. However, the reliability relative to absolute agreement between Vertec and values contained significant variation (based on CI values), thus, it is recommended that either the or the Vertec be used to assess VJ height in repeated measures within subjects' designs; these measurement tools should not be considered interchangeable within subjects or in group measurement designs.
纵跳用于评估儿童、老年人、非运动员和受伤个体的运动表现能力和身体素质。有不同的跳跃技术和测量工具可用于评估纵跳高度和峰值功率；然而，它们的使用受到实验室环境、成本过高和/或时间限制的制约，因此这些工具往往不适用于现场评估。一种流行的现场测试使用维尔泰克（Vertec）和萨金特（Sargent）反向运动纵跳；然而，新的低成本、易于使用的工具不断涌现，包括iOS移动应用程序（app）。本研究的目的是评估相对于维尔泰克所获得的值，该应用程序用于萨金特站立摸高纵跳（VJ）测试的可靠性。
135名年龄在18 - 39岁的健康参与者（94名男性，41名女性）完成了三次最大幅度的萨金特反向运动VJ，同时使用维尔泰克和该应用程序进行测量。对每次跳跃的高度进行量化，并使用赛耶斯方程计算峰值功率。使用四个独立的组内相关系数（ICC）估计值及其95%置信区间来评估可靠性。两项分析（分别以跳跃高度和计算出的峰值功率作为因变量）基于单评分者、一致性、双向混合效应模型，而另外两项分析（分别以跳跃高度和计算出的峰值功率作为因变量）基于单评分者、绝对一致性、双向混合效应模型。
相对于维尔泰克和该应用程序值之间的一致性程度，跳跃高度（ICC = 0.813；95% CI [0.747 - 0.863]）和计算出的峰值功率（ICC = 0.926；95% CI [0.897 - 0.947]）具有中度到高度的可靠性。然而，相对于VJ高度的绝对一致性，可靠性较差到良好（ICC = 0.665；95% CI [0.050 - 0.859]），相对于峰值功率的绝对一致性，可靠性较差到高度（ICC = 0.851；95% CI [0.272 - 0.946]）；维尔泰克VJ高度以及因此维尔泰克计算出的峰值功率值显著高于从该应用程序值计算出的值（P < 0.0001）。
该应用程序可能在多个现场和实验室环境中提供纵跳高度和计算出的峰值功率的可靠测量，而无需诸如测力板或维尔泰克等昂贵设备。相对于维尔泰克和该应用程序之间的一致性程度，可靠性为中度到高度。然而，相对于维尔泰克和该应用程序值之间的绝对一致性，可靠性存在显著差异（基于CI值），因此，建议在受试者内设计的重复测量中使用该应用程序或维尔泰克来评估VJ高度；在受试者内或组测量设计中，不应认为这些测量工具可互换。
