School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia.
Department of Sport and Exercise Sciences, University of Chichester, Chichester, United Kingdom.
J Strength Cond Res. 2022 Nov 1;36(11):3000-3007. doi: 10.1519/JSC.0000000000004057. Epub 2021 May 5.
Kotani, Y, Lake, J, Guppy, SN, Poon, W, Nosaka, K, Hori, N, and Haff, GG. The reliability of the squat jump force-velocity and load-velocity profiles. J Strength Cond Res 36(11): 3000-3007, 2022-The purpose of this study was to investigate the between-session reliability of the squat jump force-velocity (FV) and load-velocity (LV) profiles. Eighteen subjects (age = 28.1 ± 4.8 years; height = 1.7 ± 9.7; body mass = 74.7 ± 12.8) who could back squat >1.5 times body mass participated in this study. Each subject completed a familiarization session, followed by 2 experimental sessions each separated by 72 hours. Subjects performed a series of squat jumps on a force plate against external loads between 0 and 100% of their body mass in a quasi-randomized block order. Intraclass correlation coefficient (ICC) and coefficient of variation (CV) were used to examine the between-session reliability. Peak velocity (PV) and mean velocity (MV) at each load were highly reliable (ICC >0.80, CV% <7.41, SEM <0.13 m·s -1 , smallest detectable difference [SDD] <0.31 m·s -1 , ES <0.21). Force-velocity profiles created with peak force and relative peak force resulted in poor to excellent reliability (ICC = 0.34-0.92, CV% = 11.9-26.3). When mean and relative mean forces were used to create FV profiles, there was poor to good reliability (ICC = 0.03-0.85, CV% = 18.1-39.4). When the LV profile was calculated with PV (ICC = 0.60-0.90, CV% = 7.9-16.9) or MV (ICC = 0.49-0.91, CV% = 11.1-23.4), there was poor to excellent reliability. There was no time effect found between sessions for both FV and LV profiles. The squat jump FV and LV profiles established with a force plate are not reliable. Therefore, these profiles are not recommended to be used to inform programming decisions.
Kotani、Y、Lake、J、Guppy、SN、Poon、W、Nosaka、K、Hori、N 和 Haff、GG。深蹲跳力量-速度和负荷-速度曲线的可靠性。J 力量与调节研究 36(11)：3000-3007，2022-本研究旨在探讨深蹲跳力量-速度(FV)和负荷-速度(LV)曲线的组间可靠性。18 名受试者(年龄=28.1±4.8 岁；身高=1.7±9.7；体重=74.7±12.8)，可深蹲超过体重的 1.5 倍，参加了本研究。每位受试者完成一次熟悉过程，然后在 72 小时内进行 2 次实验。受试者在一个力板上以 0 到 100%体重的外部负荷进行一系列深蹲跳，采用准随机块序。采用组内相关系数(ICC)和变异系数(CV)来检验组间可靠性。各负荷下的峰值速度(PV)和平均速度(MV)均具有高度可靠性(ICC>0.80，CV%<7.41，SEM<0.13 m·s-1，最小可检测差异[SDD]<0.31 m·s-1，ES<0.21)。用峰值力和相对峰值力制作的力-速度曲线具有良好到优秀的可靠性(ICC=0.34-0.92，CV%=11.9-26.3)。当使用平均力和相对平均力制作 FV 曲线时，可靠性为良好到中等(ICC=0.03-0.85，CV%=18.1-39.4)。当用 PV(ICC=0.60-0.90，CV%=7.9-16.9)或 MV(ICC=0.49-0.91，CV%=11.1-23.4)计算 LV 曲线时，可靠性为良好到优秀。两次试验之间的 FV 和 LV 曲线均无时间效应。使用力量板建立的深蹲跳 FV 和 LV 曲线不可靠。因此，不建议将这些曲线用于编程决策。
