Harper Damian J, Jordan Alastair R, Kiely John
School of Sport, York St John University, York, United Kingdom ; and.
Institute of Coaching and Performance, School of Sport and Wellbeing, University of Central Lancashire, Preston, United Kingdom.
J Strength Cond Res. 2021 Feb 1;35(2):465-472. doi: 10.1519/JSC.0000000000002739.
Harper, DJ, Jordan, AR, and Kiely, J. Relationships between eccentric and concentric knee strength capacities and maximal linear deceleration ability in male academy soccer players. J Strength Cond Res 35(2): 465-472, 2021-The purpose of this study was to investigate the relationships between maximal linear deceleration ability, and knee flexor (KF) and knee extensor (KE) strength. Fourteen male academy soccer players completed a 30-m linear sprint, a maximal linear deceleration test, and eccentric and concentric KF and KE contractions in both dominant leg (DL) and nondominant leg (NDL) at slower (60°·s-1) and faster (180°·s-1) angular velocities on an isokinetic dynamometer. Maximal linear deceleration ability was evaluated using distance-to-stop (DEC-DTS) and time-to-stop (DEC-TTS), with isokinetic peak torque representing KF and KE strength capacity. Relationships were established using Pearson's correlation coefficients (r) with magnitude-based inferences used to describe the uncertainty in the correlation. Both concentric KE and KF strength at 180°·s-1 in the NDL had the highest correlations with deceleration ability (r = -0.76 and r = -0.78, respectively). In the DL, concentric KE and KF strength at 180°·s-1 also had very likely large correlations with deceleration ability (r = -0.54 and -0.55, respectively). All correlations between eccentric KF strength and deceleration ability were unclear. At 180°·s-1, correlations between eccentric KE strength and deceleration ability were also unclear; however, at 60°·s-1, both DL (r = -0.63 to -0.64) and NDL (r = -0.54 to -0.55) had very likely large correlations with deceleration ability. These findings provide novel insights into the unilateral KF and KE strength capacities underpinning the ability to decelerate rapidly from high-sprint velocities.
哈珀、DJ、乔丹、AR和基利、J。男子学院足球运动员离心和向心膝关节力量能力与最大线性减速能力之间的关系。《力量与体能研究杂志》35(2):465 - 472，2021年——本研究的目的是调查最大线性减速能力与膝关节屈肌（KF）和膝关节伸肌（KE）力量之间的关系。14名男子学院足球运动员完成了30米直线冲刺、最大线性减速测试，以及在等速测力计上以较慢（60°·秒⁻¹）和较快（180°·秒⁻¹）角速度在优势腿（DL）和非优势腿（NDL）上进行的离心和向心KF和KE收缩。使用停止距离（DEC - DTS）和停止时间（DEC - TTS）评估最大线性减速能力，等速峰值扭矩代表KF和KE力量能力。使用皮尔逊相关系数（r）建立关系，并使用基于量级的推断来描述相关性中的不确定性。非优势腿在180°·秒⁻¹时的向心KE和KF力量与减速能力的相关性最高（分别为r = - 0.76和r = - 0.78）。在优势腿中，180°·秒⁻¹时的向心KE和KF力量与减速能力也极有可能存在高度相关性（分别为r = - 0.54和 - 0.55）。离心KF力量与减速能力之间的所有相关性均不明确。在180°·秒⁻¹时，离心KE力量与减速能力之间的相关性也不明确；然而，在60°·秒⁻¹时，优势腿（r = - 0.63至 - 0.64）和非优势腿（r = - 0.54至 - 0.55）与减速能力极有可能存在高度相关性。这些发现为支撑从高冲刺速度快速减速能力的单侧KF和KE力量能力提供了新的见解。
