University School of Health and Sport (EUSES), University of Girona, Girona, Spain.
University School of Health and Sport (EUSES), University of Rovira Virgili, Amposta, Spain.
J Strength Cond Res. 2021 Dec 1;35(12):3482-3490. doi: 10.1519/JSC.0000000000003328.
Madruga-Parera, M, Bishop, C, Beato, M, Fort-Vanmeerhaeghe, A, Gonzalo-Skok, O, and Romero-Rodríguez, D. Relationship between inter-limb asymmetries and speed and change of direction speed in youth handball players. J Strength Cond Res 35(12): 3482-3490, 2021-The aims of the present study were to quantify interlimb asymmetry from jumping, change of direction speed (CODS), and iso-inertial tests and to establish the association between those asymmetry scores and performance during speed and CODS tests in youth handball athletes. Twenty-six youth handball players (age: 16.2 ± 0.9 years) volunteered to participate in this study and performed single-leg countermovement jumps, single-leg broad jumps, single-leg lateral jumps, CODS tests at 180° (CODS180) and 90° (CODS90), change of direction actions with iso-inertial overload (crossover step [CRO] and lateral shuffle step), and a 20-m sprint test. Excellent intraclass correlation coefficient (ICC) values were found for all tests (ICC = 0.96-1.00) with the exception of the dominant limb during the CODS90 test (ICC = 0.69). Interlimb asymmetry scores ranged from 3.66 to 12.67%. Iso-inertial asymmetry values were higher than those found during jumping tasks (9.8-12.7% vs. 3.66-8.76%). Spearman's r correlations showed significant relationships between CRO asymmetry and CODS90 performance on both limbs (r = 0.48-0.51; p < 0.05) and CODS180 (r = 0.41-0.51; p < 0.05) and a sprint test (r = 0.46; p < 0.05). These results show the test-specific nature of asymmetries in youth handball players, with iso-inertial device and CODS deficit presenting the greatest magnitude of asymmetries. Furthermore, interlimb differences during iso-inertial device (CRO) were associated with reduced CODS and sprint performance. These results suggest that the use of iso-inertial devices for the detection of interlimb asymmetry may be more effective than the total time during traditional CODS tests and that larger imbalances are associated with reduced athletic performance in youth handball players.
马德里加-帕雷拉、M、毕晓普、C、贝托、M、福特-范米尔黑格、A、冈萨洛-斯科克、O 和罗梅罗-罗德里格斯、D. 青少年手球运动员的四肢间不对称与速度和变向速度的关系。J 力量与调节研究 35(12):3482-3490，2021-本研究的目的是量化从跳跃、变向速度 (CODS) 和等动测试中获得的四肢间不对称，并确定青少年手球运动员在速度和 CODS 测试中这些不对称分数与表现之间的关系。26 名青少年手球运动员 (年龄：16.2±0.9 岁) 自愿参加本研究，进行单腿反跳、单腿跳远、单腿侧跳、180°(CODS180)和 90°(CODS90)的 CODS 测试、带有等动过载的变向动作 (交叉步 [CRO]和横向滑步) 和 20m 冲刺测试。所有测试的优秀组内相关系数 (ICC) 值都很高 (ICC=0.96-1.00)，除了 CODS90 测试中优势腿的 ICC 值为 0.69。四肢间不对称分数范围为 3.66-12.67%。等动不对称值高于跳跃任务中发现的分数 (9.8-12.7%比 3.66-8.76%)。Spearman r 相关分析显示，CRO 不对称与四肢 CODS90 表现之间存在显著关系 (r=0.48-0.51；p<0.05) 和 CODS180(r=0.41-0.51；p<0.05)和冲刺测试 (r=0.46；p<0.05)。这些结果表明青少年手球运动员的不对称性具有测试特异性，等动设备和 CODS 不足表现出最大的不对称性。此外，等动设备 (CRO) 期间的四肢间差异与 CODS 和冲刺表现降低有关。这些结果表明，与传统 CODS 测试中的总时间相比，使用等动设备检测四肢间不对称可能更有效，并且更大的不平衡与青少年手球运动员运动表现降低有关。
