Association between lumbo-pelvic rhythm and dynamic balance among developmental field players of Eastern India. A Cross-sectional Study

TITLE: Association between lumbo-pelvic rhythm and dynamic balance among male hockey players. A Pilot Study. Author : Anshu kumar ray (PG student) , Abhinav Bindra Sports Medicine And Reasearch Institute. Bhubaneshwar. Co-author : Joydip saha, Associate professor, Abhinav Bindra Sports Medicine And Research Institute. Bhubaneshwar. Background Field hockey requires lateral dominance with sustained forward flexed and asymmetrical positions, which may affect lumbo-pelvic biomechanics. Alterations in lumbo-pelvic rhythm may impact lower limb function. Although dynamic balance is considered crucial, its relationship with LPR in young hockey players is unclear. Aim To determine the association between lumbo-pelvic rhythm and dynamic balance among developmental male field hockey player. Method Fourteen male field hockey players (mean age: 16.71 ± 2.27 years) participated in this pilot study. The Star Excursion Balance Test (SEBT) was used to measure dynamic balance, and 2D video analysis software KINOVEA was used to measure lumbo-pelvic rhythm in the sagittal plane during forward trunk flexion. Composite reach scores were calculated for dominant and non-dominant limbs. The relationship between LPR and dynamic balance was examined using the Chi-square test with Phi/Cramer's V as a measure of effect size. Conclusion The results of this pilot study clearly suggest a strong association between lumbo-pelvic rhythm and dynamic balance in developmental male field hockey players. Keywords Hockey; Biomechanical phenomena ; software ; Lower extremity ; MaleTITLE: 男子场地曲棍球运动员腰骨盆节律与动态平衡的相关性：一项预试验研究 作者：安舒·库马尔·雷（在读研究生），布巴内斯瓦尔阿比纳夫·宾德拉运动医学与研究学院 共同作者：乔伊迪普·萨哈，副教授，布巴内斯瓦尔阿比纳夫·宾德拉运动医学与研究学院 背景：场地曲棍球运动要求运动员具备侧向主导能力，且需长时间维持前屈与不对称姿势，这可能对腰骨盆节律（lumbo-pelvic rhythm, LPR）的生物力学特性产生影响。腰骨盆节律的改变可能影响下肢功能。尽管动态平衡被认为是运动表现的关键因素，但青年曲棍球运动员中其与腰骨盆节律的关联尚不明确。 目的：明确处于发育阶段的男子场地曲棍球运动员腰骨盆节律与动态平衡之间的相关性。 方法：本预试验共纳入14名男子场地曲棍球运动员（平均年龄：16.71±2.27岁）。采用星型伸展平衡测试（Star Excursion Balance Test, SEBT）测量动态平衡，使用2D视频分析软件KINOVEA测量躯干前屈过程中矢状面的腰骨盆节律。计算优势侧与非优势侧下肢的综合伸展得分。采用卡方检验，并以Phi系数（Phi）与克莱默V系数（Cramer's V）作为效应量指标，分析腰骨盆节律与动态平衡之间的关联。 结论：本预试验结果明确显示，处于发育阶段的男子场地曲棍球运动员的腰骨盆节律与动态平衡之间存在显著相关性。 关键词：曲棍球；生物力学现象；软件；下肢；男性