Department of Movement and Sport Sciences, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.
School of Science and Technology, London Sport Institute, Middlesex University, London, UK.
J Sports Sci. 2022 Jul;40(14):1618-1628. doi: 10.1080/02640414.2022.2096769. Epub 2022 Jul 13.
Besides examining upper and lower limb morphological and functional asymmetry magnitudes, this study examined the relationship between lean mass and functional asymmetry in terms of magnitude and direction in 41 youth tennis players versus 41 controls. Asymmetry magnitude was determined using anthropometric measurements (circumferences, widths), bioelectrical impedance analysis (lean mass) and a test battery (handgrip strength, seated medicine ball throw, plate tapping, single leg countermovement jump, single leg forward hop test, 6 m single leg hop test, 505 change of direction). s compared the dominant (overall highest/best value) against the non-dominant (highest/best value of opposing limb) result. Linear regressions explored the relationship between lean mass and functional asymmetry magnitudes. Kappa coefficients examined asymmetry direction consistency between the limb displaying the highest lean mass value and the limb performing dominantly across tests. Significant asymmetry magnitudes (p < 0.05) were found for all upper and lower limb outcome measures. No significant relationship was apparent between lean mass and functional asymmetry magnitude (r-value = -0.283-0.262). Despite finding (almost) perfect consistency in asymmetry direction (k-value = 0.84-1.00) for the upper limb, poor to slight consistency (k-value = -0.03-0.15) was found for the lower limb. Therefore, lean mass and functional asymmetry should be examined independently.
除了检查上肢和下肢形态和功能的不对称程度外，本研究还检查了 41 名青年网球运动员和 41 名对照者的瘦体重与功能不对称的关系，包括幅度和方向。不对称程度通过人体测量（周长、宽度）、生物电阻抗分析（瘦体重）和测试组合（握力、坐姿药球投掷、平板敲击、单腿反向跳跃、单腿前向跳跃测试、6 米单腿跳跃测试、505 变向测试）来确定。研究人员将优势侧（整体最高/最佳值）与非优势侧（对侧肢体的最高/最佳值）的结果进行了比较。线性回归分析了瘦体重与功能不对称幅度之间的关系。kappa 系数检验了在显示最高瘦体重值的肢体和在所有测试中表现出优势的肢体之间的不对称方向一致性。所有上肢和下肢的结果测量都发现了显著的不对称幅度（p < 0.05）。瘦体重与功能不对称幅度之间没有明显的关系（r 值为 -0.283-0.262）。尽管在上肢发现了（几乎）完全一致的不对称方向（k 值为 0.84-1.00），但在下肢发现了较差到轻微的一致性（k 值为 -0.03-0.15）。因此，瘦体重和功能不对称应该独立进行检查。
