Swain Christopher T V, Whyte Douglas G, Ekegren Christina L, Taylor Paul, McMaster Kate, Lee Dow Connor, Bradshaw Elizabeth J
School of Behavioural and Health Sciences, Australian Catholic University, Daniel Mannix Building, 17 Young St, Fitzroy, VIC 3065, Australia.
Department of Epidemiology and Preventive Medicine, Monash University, 553 St Kilda Road, Melbourne, VIC 3004, Australia.
Gait Posture. 2019 Feb;68:274-279. doi: 10.1016/j.gaitpost.2018.12.001. Epub 2018 Dec 4.
Spine posture, range of motion (ROM) and movement asymmetry can contribute to low back pain (LBP). These variables may have greater impact in populations required to perform repetitive spine movements, such as dancers; however, there is limited evidence to support this.
What is the influence of dance and LBP on spinal kinematics?
In this cross-sectional study, multi-segment spinal kinematics were examined in 60 female participants, including dancers (n = 21) and non-dancers (n = 39) with LBP (n = 33) and without LBP (n = 27). A nine-camera motion analysis system sampling at 100 Hz was used to assess standing posture, as well as ROM and movement asymmetry for side bend and trunk rotation tasks. A two-way ANOVA was performed for each of the outcome variables to detect any differences between dancers and non-dancers, or individuals with and without LBP.
Compared to non-dancers, dancers displayed a flatter upper lumbar angle when standing (p < 0.01, ηp = 0.15), and achieved greater frontal plane ROM for the upper lumbar (p = 0.04, ηp = 0.08) and lower thoracic (p = 0.02, ηp = 0.09) segments. There were no differences between dancers and non-dancers for transverse plane ROM (p > 0.05) or movement asymmetry (p > 0.05). There was no main effect for LBP symptoms on any kinematic measures, and no interaction effect for dance group and LBP on spinal kinematics (p > 0.05).
Female dancers displayed a flatter spine posture and increased spine ROM compared to non-dancers for a select number of spine segments and movement tasks. However, the overall number of differences was small, and no relationship was observed between LBP and spinal kinematics. This suggests that these simple, static posture, ROM, and asymmetry measures often used in clinical practice can provide only limited generalisable information about the impact of dance or LBP on spinal kinematics.
脊柱姿势、活动范围（ROM）和运动不对称性可能导致腰痛（LBP）。这些变量可能对需要进行重复性脊柱运动的人群，如舞者，产生更大影响；然而，支持这一观点的证据有限。
舞蹈和腰痛对脊柱运动学有何影响？
在这项横断面研究中，对60名女性参与者进行了多节段脊柱运动学检查，其中包括舞者（n = 21）和非舞者（n = 39），有腰痛者（n = 33）和无腰痛者（n = 27）。使用一个以100Hz采样的九摄像头运动分析系统来评估站立姿势，以及侧弯和躯干旋转任务的ROM和运动不对称性。对每个结果变量进行双向方差分析，以检测舞者和非舞者之间，或有和无腰痛的个体之间的任何差异。
与非舞者相比，舞者站立时上腰椎角度更平（p < 0.01，ηp = 0.15），上腰椎（p = 0.04，ηp = 0.08）和下胸椎（p = 0.02，ηp = 0.09）节段在额状面的ROM更大。舞者和非舞者在横断面ROM（p > 0.05）或运动不对称性（p > 0.05）方面没有差异。腰痛症状对任何运动学指标均无主效应，舞蹈组和腰痛对脊柱运动学也无交互效应（p > 0.05）。
与非舞者相比，女性舞者在特定数量的脊柱节段和运动任务中表现出更平的脊柱姿势和更大的脊柱ROM。然而，差异的总数很少，且未观察到腰痛与脊柱运动学之间的关系。这表明临床实践中常用的这些简单的静态姿势、ROM和不对称性测量方法，对于舞蹈或腰痛对脊柱运动学的影响，只能提供有限的可推广信息。
