Sports Performance Research Institute New Zealand, Auckland, New Zealand.
New Zealand Rugby Union, Wellington, New Zealand.
J Strength Cond Res. 2018 Mar;32(3):690-699. doi: 10.1519/JSC.0000000000002359.
Bourgeois, FA II, Gamble, P, Gill, ND, and McGuigan, MR. The relationship between multidirectional jumping and performance in change of direction tasks. J Strength Cond Res 32(3): 690-699, 2018-This study investigated the test-retest reliability of 2 change of direction (COD; 180 and 45° COD) sprints and 3 multidirectional jump (MDJ) tests. Variables examined were approach time (sprint before plant-step), exit time (sprint after plant-step), total time (time to completion) and MDJ approach time, and distance, respectively. Second, the ability of MDJ tests to predict performance in COD tests was examined. Twenty men (age: 27.5 ± 5.9 years; height: 1.79 ± 0.1 m; and body mass: 79.1 ± 12.0 kg) performed 5 trials for each assessment, executing left plant-leg (LT) and right plant-leg (RT) steps, on 2 testing occasions separated by 7 days. Between-session and within-session intraclass correlation coefficients (ICCs) and coefficients of variation (CVs) for all measurements were calculated. Usefulness of COD and MDJ tests was assessed using typical error and smallest worthwhile change (SWC) comparison. Results showed only one MDJ measurement generated unstable between-session reliability. Within-session reliability of approach and exit COD times, and MDJ approach times possessed confidence limits (90% CL) that extended below 0.75 ICC. All COD total times and MDJ distances presented high reliability (ICC = 0.87-0.99) with low CV (0.9-4.1%). Right-leg MDJ distances were predictors of RT COD performances (r = 0.50-0.68, p = 0.001-0.024), whereas LT MDJ distances were predictors of LT180 COD performance (r = 0.67-0.71, p = 0.001). All measurements were useful in detecting SWC in performance. These findings suggest the COD tests and MDJ distances are reliable for assessing and monitoring COD performance in similar cohorts.
布瓦瑟利耶二世、甘博、P、吉尔、ND 和麦圭根，MR。多方向跳跃与变向任务表现的关系。J 力量与调节研究 32(3):690-699,2018-本研究调查了 2 种变向(COD;180°和 45° COD)冲刺和 3 种多方向跳跃(MDJ)测试的测试-再测试可靠性。检查的变量包括：接近时间(冲刺前的植物步)、退出时间(植物步后的冲刺)、总时间(完成时间)和 MDJ 接近时间，以及距离。其次，考察了 MDJ 测试对 COD 测试表现的预测能力。20 名男性(年龄：27.5±5.9 岁;身高：1.79±0.1 米;体重：79.1±12.0 千克)在 2 次测试中，分别在 7 天内进行了 5 次测试，执行左植物腿(LT)和右植物腿(RT)步骤。计算了所有测量值的组内相关系数(ICC)和变异系数(CV)。使用典型误差和最小有意义变化(SWC)比较评估了 COD 和 MDJ 测试的有用性。结果表明，只有一个 MDJ 测量值在组间表现出不稳定的可靠性。在 COD 接近和退出时间的组内可靠性，以及 MDJ 接近时间的置信区间(90%CL)延伸到 0.75ICC 以下。所有 COD 总时间和 MDJ 距离呈现出高可靠性(ICC=0.87-0.99)和低变异系数(0.9-4.1%)。右腿 MDJ 距离是 RT COD 表现的预测指标(r=0.50-0.68，p=0.001-0.024)，而左腿 MDJ 距离是 LT180 COD 表现的预测指标(r=0.67-0.71，p=0.001)。所有测量值都有助于检测性能的 SWC。这些发现表明，COD 测试和 MDJ 距离可用于评估和监测类似队列的 COD 表现。
