Exercise and Sports Science Program, The University of Tulsa, Tulsa, Oklahoma, USA.
J Strength Cond Res. 2010 Oct;24(10):2799-808. doi: 10.1519/JSC.0b013e3181b66679.
A Vertec jump measurement and training system measures vertical jump heights but not additional variables that would reveal how the performance was achieved. Technology advances to equipment now include additional variables that elucidate how jump performance is achieved. However, acceptance of new jump-related equipment is predicated on the reliability of the vertical heights it measures in relation to those assessed by the Vertec. Thus, our study compared vertical jump height reliability data from a newly created instrumented platform to those concurrently derived from the Vertec. Methods required subjects (n = 105) to perform 2 jump trials separated by at least 2 days of rest. Trials began with a warm-up, followed by 3 to 5 maximal-effort jumps. The Vertec was placed directly over the platform so, as jumps occurred, subjects took off and landed on the instrumented device. At the jump apex subjects contacted the highest Vertec slapstick possible to assess maximum height attained. Four height measurements were derived from each jump: 3 platform-based calculations (from subject's take-off, hang time, and landing) and 1 Vertec. The platform-based calculations were compared to Vertec data to assess the reliability of the instrumented device. Intraclass correlation coefficient (0.90), coefficient of variation (17.3%), standard error of measurement (0.9 cm), and smallest real difference (3.7 cm) results showed heights calculated from platform take-offs were most reliable to Vertec values. It was concluded take-off from the platform yielded jump heights that are a viable alternative to those derived from the Vertec. Practical applications suggest coaches may use the platform to derive reliable vertical jump data in addition to other variables to better understand the performance of their athletes.
一个 Vertec 跳跃测量和训练系统可以测量垂直跳跃高度，但无法提供其他变量，这些变量可以揭示表现是如何实现的。现在，技术进步已经将设备的附加变量包括在内，这些变量可以阐明跳跃表现是如何实现的。然而，新的与跳跃相关的设备的接受程度取决于它所测量的垂直高度与 Vertec 评估的高度之间的可靠性。因此，我们的研究比较了新创建的仪器化平台的垂直跳跃高度可靠性数据与 Vertec 同时得出的数据。方法要求受试者（n=105）进行至少 2 天休息的 2 次跳跃试验。试验开始时进行热身，然后进行 3 到 5 次最大努力的跳跃。Vertec 直接放在平台上方，因此，当跳跃发生时，受试者在仪器设备上起跳和着陆。在跳跃顶点，受试者接触到最高的 Vertec 棍棒，以评估达到的最大高度。每个跳跃有 4 个高度测量值：3 个基于平台的计算值（从受试者的起跳、腾空时间和着陆）和 1 个 Vertec 值。将基于平台的计算值与 Vertec 数据进行比较，以评估仪器设备的可靠性。组内相关系数（0.90）、变异系数（17.3%）、测量标准误差（0.9 厘米）和最小真实差异（3.7 厘米）的结果表明，平台起跳计算出的高度与 Vertec 值最可靠。结论是，从平台起跳可以得出与 Vertec 相似的可靠跳跃高度，是一种替代方法。实际应用表明，教练可以使用平台来获取可靠的垂直跳跃数据以及其他变量，以更好地了解运动员的表现。
