Department of Movement and Sport Sciences, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, 1050 Brussels, Belgium.
London Sport Institute, Middlesex University, London NW4 4BT, UK.
Int J Environ Res Public Health. 2021 Nov 13;18(22):11928. doi: 10.3390/ijerph182211928.
The relationship between lean mass and functional asymmetry in terms of their magnitude and direction was examined in 22 high-level female tennis players (20.9 ± 3.6 years). Lean mass of both upper and lower extremities was examined using Dual X-ray Absorptiometry. Functional asymmetry was assessed using a battery of field tests (handgrip strength, seated shot-put throw, plate tapping, single leg countermovement jump, single leg forward hop test, 6 m single leg hop test, and 505 change of direction (time and deficit)). Paired sample -tests compared the dominant (overall highest/best (performance) value) against the non-dominant value (highest/best (performance) value of the opposing extremity). Linear regressions were used to explore the relationship between lean mass and functional asymmetry magnitudes. Kappa coefficients were used to examine the consistency in direction between the extremity displaying the highest lean mass value and the extremity performing dominantly across tests. Significant asymmetry magnitudes ( < 0.05) were found for all upper and lower extremity lean mass and functional values. No relationship was apparent between lean mass and functional asymmetry magnitudes (-value range = 0.131-0.889). Despite finding perfect consistency in asymmetry direction (k-value = 1.00) for the upper extremity, poor to fair consistency (k-value range = -0.00-0.21) was found for the lower extremity. In conclusion, lean mass and functional asymmetries should be examined independently.
研究了 22 名高水平女性网球运动员（20.9 ± 3.6 岁）在幅度和方向上瘦体重与功能不对称之间的关系。使用双能 X 射线吸收法检查上下肢的瘦体重。使用一系列现场测试（握力、坐姿投球、板击、单腿反向跳跃、单腿向前跳跃测试、6 米单腿跳跃测试和 505 变向测试（时间和不足））评估功能不对称。配对样本检验比较了优势侧（整体最高/最佳（表现）值）与非优势侧（对侧肢体的最高/最佳（表现）值）。线性回归用于探索瘦体重和功能不对称幅度之间的关系。Kappa 系数用于检查显示最高瘦体重值的肢体与在所有测试中表现占优的肢体之间的方向一致性。所有上下肢瘦体重和功能值均存在显著的不对称幅度（<0.05）。瘦体重与功能不对称幅度之间没有明显的关系（-值范围=0.131-0.889）。尽管在上肢发现了完美的不对称方向一致性（k 值=1.00），但在下肢发现了较差到中等的一致性（k 值范围=-0.00-0.21）。总之，瘦体重和功能不对称性应分别进行检查。
