Development and Reliability of Countermovement Jump Performance in Youth Athletes at Pre-, Circa- and Post-Peak Height Velocity

Thomas Bright, Matthew J. Handford, J. Hughes, Peter D. Mundy, Jason P. Lake, L. Doggart
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引用次数: 1

Abstract

The purpose of this study was to determine the intrasession reliability of countermovement jump (CMJ) braking and propulsive phase variables in youth athletes. Thirty youth athletes between the age of 10- and 16-years volunteered to take part in this study. All participants performance 3 CMJ trials on a force platform. Thirteen of 16 CMJ variables were found to have acceptable absolute reliability in the pre-PHV group (CV% = 3.51-9.96) whilst the circa-PHV group contained 10 variables demonstrating acceptable absolute reliability (CV% = 2.37-9.67). Almost all variables (14 out of 16) in the post-PHV group were found to have acceptable absolute reliability (CV% = 2.59-9.61). Mean and peak braking RFD displayed poor absolute reliability in all maturity groups (CV% = 10.89-21.55). Time to take-off, braking and propulsive phase time and propulsive impulse demonstrated the largest differences between pre- and circa-PHV groups (p < 0.005; d > 0.95). Braking phase time, peak and mean braking force, mean braking power and RSImod demonstrated the biggest differences between the circa- and post-PHV groups (p < 0.001; d > 1.81). The poorest reliability scores were found in the circa-PHV group, demonstrating the need for additional familiarisation at this stage of maturity.
青年运动员峰前、峰中、峰后反动作跳跃能力的发展与可靠性
摘要本研究旨在探讨青少年运动员反动作跳跃(CMJ)制动与推进阶段变量的运动内信度。30名年龄在10到16岁之间的青少年运动员自愿参加了这项研究。所有参与者在力平台上进行3次CMJ试验。16个CMJ变量中有13个在phv前组具有可接受的绝对信度(CV% = 3.51-9.96),而phv前后组包含10个变量具有可接受的绝对信度(CV% = 2.37-9.67)。phv后组中几乎所有变量(16个变量中的14个)都具有可接受的绝对信度(CV% = 2.59-9.61)。在所有成熟度组中,平均和峰值制动RFD显示出较差的绝对可靠性(CV% = 10.89-21.55)。起飞时间、制动时间、推进相位时间和推进冲量在phv前后两组间差异最大(p < 0.005;D > 0.95)。制动相时间、峰值和平均制动力、平均制动力和RSImod在phv前后组之间差异最大(p < 0.001;D > 1.81)。在大约phv组中发现了最差的可靠性分数,这表明在这个成熟阶段需要额外的熟悉。
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