Nishioka Takuya, Yamaguchi Shota, Hajima Daiki, Kunita Yasuhiro, Inami Takayuki
Institute of Physical Education, Keio University, Yokohama, Japan.
Graduate School of Health Management (Sports and Health Sciences), Keio University, Yokohama, Japan.
PLoS One. 2025 Sep 2;20(9):e0331671. doi: 10.1371/journal.pone.0331671. eCollection 2025.
This study aimed to compare the intra-session reliability of force-velocity-power variables obtained from a horizontal dynamic leg press device (HDLPD) and vertical jump tests. Nineteen male field hockey players performed maximal leg extension movements in HDLPD under a wide range of available load conditions (100, 120, 140, 160, 180, and 200% body weight [BW]), followed by squat jumps (SJ) and countermovement jumps (CMJ) under unloaded (0 kg), moderate- (22.0 ± 4.6 kg), and high-loaded (43.9 ± 9.2 kg) conditions. The peak and mean values of force, velocity, and power derived from the HDLPD, SJ, and CMJ were calculated. The HDLPD showed acceptable intrasession reliability for all experimental outcomes (intraclass correlation coefficient [ICC] = 0.845 to 0.974, coefficient of variation [CV] = 0.43% to 4.52%). The outcome variables during SJ and CMJ had acceptable intra-session reliability, except for the relative reliability of some variables (ICC = 0.588-0.973, CV = 1.19%-8.38%). The results of this study showed that the HDLPD has high intrasession reliability in measuring force-velocity-power variables for maximal leg extension performance. In addition, for some force-velocity-power variables, HDLPD can provide more reliable measurements than vertical jumps. Therefore, the HDLPD can be useful for practitioners who want to reliably measure leg extension strength, speed, and power outcomes.
本研究旨在比较从水平动态腿部推举装置（HDLPD）和垂直纵跳测试中获得的力-速度-功率变量的组内可靠性。19名男性曲棍球运动员在一系列可用负荷条件下（100%、120%、140%、160%、180%和200%体重[BW]）在HDLPD上进行最大腿部伸展运动，随后在无负荷（0 kg）、中等负荷（22.0±4.6 kg）和高负荷（43.9±9.2 kg）条件下进行深蹲跳（SJ）和反向纵跳（CMJ）。计算了HDLPD、SJ和CMJ得出的力、速度和功率的峰值和平均值。HDLPD对所有实验结果均显示出可接受的组内可靠性（组内相关系数[ICC]=0.845至0.974，变异系数[CV]=0.43%至4.52%）。SJ和CMJ期间的结果变量具有可接受的组内可靠性，但某些变量的相对可靠性除外（ICC=0.588 - 0.973，CV=1.19% - 8.38%）。本研究结果表明，HDLPD在测量最大腿部伸展性能的力-速度-功率变量方面具有较高的组内可靠性。此外，对于一些力-速度-功率变量，HDLPD比垂直纵跳能提供更可靠的测量。因此，HDLPD对于想要可靠测量腿部伸展力量、速度和功率结果的从业者可能有用。
