Perri Thomas, Reid Machar, Murphy Alistair, Howle Kieran, Duffield Rob
School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney, Sydney, Australia.
Tennis Australia, Melbourne, Australia; and.
J Strength Cond Res. 2023 Mar 1;37(3):646-651. doi: 10.1519/JSC.0000000000004318. Epub 2022 Sep 8.
Perri, T, Reid, M, Murphy, A, Howle, K, and Duffield, R. Differentiating stroke and movement accelerometer profiles to improve prescription of tennis training drills. J Strength Cond Res 37(3): 646-651, 2023-This study compared the movement- and stroke-related accelerometer profiles and stroke counts between common on-court tennis training drills. Ten, junior-elite, male tennis players wore a cervical-mounted global positioning systems, with in-built accelerometer, gyroscope, and magnetometer during hard court training sessions ( n = 189). Individual training drills were classified into 8 categories based on previous research descriptions. Manufacturer software calculated total player load (tPL), while a prototype algorithm detected forehand (FH), backhands (BH), and serves and then calculated a stroke player load (sPL) from individual strokes. Movement player load (mPL) was calculated as the difference between tPL and sPL. Drill categories were compared for relative ( . min -1 ) tPL, sPL, mPL, and stroke counts via a 1-way analysis of variance with effect sizes (Cohen's d ) and 95% confidence intervals. Highest tPL . min -1 existed in accuracy and recovery or defensive drills ( p < 0.05), with lowest tPL·min -1 values observed in match-play simulation ( p < 0.05). For sPL·min -1 , accuracy drills elicited greater values compared with all other drill types ( p < 0.05), partly via greater FH-sPL·min -1 ( p < 0.05), with lowest sPL·min -1 existing for match-play ( p < 0.05). Accuracy, open, and recovery or defensive drills result in greater BH-sPL·min -1 and BH . min -1 ( p < 0.05). Serve-sPL·min -1 is highest in technical and match-play drills ( p < 0.05). Higher mPL·min -1 existed in accuracy, recovery or defensive, 2v1 net, open, and 2v1 baseline ( p < 0.05). Furthermore, mPL·min -1 in points drills was greater than technical and match-play simulation drills ( p < 0.05). Higher hitting-based accelerometer loads (sPL·min -1 ) exist in accuracy drills, whereas technical and match-play drills show the lowest movement demands (mPL·min -1 ). These findings can aid individual drill prescription for targeting movement or hitting load.
佩里、T、里德、M、墨菲、A、豪尔、K和达菲尔德、R。区分中风和运动加速度计特征以改善网球训练练习的处方。《力量与体能研究杂志》37(3):646 - 651，2023 - 本研究比较了常见网球场上训练练习之间与运动和击球相关的加速度计特征及击球次数。10名青少年精英男性网球运动员在硬地训练期间（n = 189）佩戴了内置加速度计、陀螺仪和磁力计的颈部安装全球定位系统。根据先前的研究描述，将个人训练练习分为8类。制造商软件计算总运动员负荷（tPL），而一种原型算法检测正手（FH）、反手（BH）和发球，然后从单个击球中计算击球运动员负荷（sPL）。运动运动员负荷（mPL）计算为tPL与sPL之差。通过具有效应大小（科恩d）和95%置信区间的单因素方差分析，比较各类练习的相对（.min -1）tPL、sPL、mPL和击球次数。最高的tPL.min -1出现在准确性和恢复或防守练习中（p < 0.05），在比赛模拟中观察到最低的tPL·min -1值（p < 0.05）。对于sPL·min -1，准确性练习与所有其他练习类型相比产生的值更大（p < 0.05），部分是通过更高的FH - sPL·min -1（p < 0.05），比赛中sPL·min -1最低（p < 0.05）。准确性、开放式和恢复或防守练习导致更高的BH - sPL·min -1和BH.min -1（p < 0.05）。发球 - sPL·min -1在技术和比赛练习中最高（p < 0.05）。更高的mPL·min -1出现在准确性、恢复或防守、2对1网前、开放式和2对1底线练习中（p < 0.05）。此外，得分练习中的mPL·min -1大于技术和比赛模拟练习（p < 0.05）。基于击球的加速度计负荷（sPL·min -1）在准确性练习中更高，而技术和比赛练习显示出最低的运动需求（mPL·min -1）。这些发现有助于针对运动或击球负荷制定个性化的练习处方。
