School of Exercise Science, Australian Catholic University, Daniel Mannix Building, 17 Young St, Fitzroy, VIC 3065, Australia.
Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, VIC 3125, Australia; Sport Performance Research Institute New Zealand, Auckland University of Technology, 17 Antares Place, Rosedale, Auckland 0632, New Zealand.
Gait Posture. 2019 May;70:53-58. doi: 10.1016/j.gaitpost.2019.02.012. Epub 2019 Feb 20.
BACKGROUND: Altered spine kinematics are a common in people with LBP. This may be especially true for populations such as dancers, who are required to perform repetitive movements of the spine, although this remains unclear. RESEARCH QUESTION: Do dancers with recent LBP display altered spine kinematics compared to their asymptomatic counterparts? METHODS: A cross-sectional study of multi-segment spine kinematics was performed. Forty-seven pre-professional and professional female dancers either with LBP in the past two months (n = 26) or no LBP in the past 12 months (n = 21) participated. Range of motion (ROM) during standing side bending, seated rotation, and walking gait were compared. RESULTS: Female dancers with LBP displayed reduced upper lumbar transverse plane ROM in seated rotation (Effect Size (ES)= -0.61, 95% Confidence Interval (CI): -1.20, 0.02, p = 0.04), as well as reduced lower lumbar transverse plane ROM (ES=-0.65, 95% CI: -1.24, -0.06, p = 0.03) in gait. However, there was increased lower thoracic transverse plane ROM (ES = 0.62, 95% CI: 0.04, 1.21, p = 0.04) during gait. No differences in the frontal plane were observed. SIGNIFICANCE: Altered transverse plane spine kinematics were evident in dancers with recent LBP for select segments and tasks. This may reflect a protective movement strategy. However, as the effect sizes of observed differences were moderate, and the total number of differences between groups was small, collectively, it seems only subtle differences in spine kinematics differentiate dancers with LBP to dancers without.
背景:下腰痛(LBP)患者脊柱运动学通常会发生改变。对于经常进行脊柱重复运动的舞者等人群,这种改变可能更为明显,尽管目前尚不清楚具体情况。
研究问题:与无症状的舞者相比,近期有 LBP 的舞者的脊柱运动学是否发生改变?
方法:进行了一项多节段脊柱运动学的横断面研究。47 名前职业和职业女性舞者,其中 26 名在过去两个月内有 LBP,21 名在过去 12 个月内无 LBP,参与了本研究。比较了站立侧屈、坐位旋转和行走步态时的运动范围(ROM)。
结果:有 LBP 的女性舞者在坐位旋转时,上腰椎横面 ROM 减小(效应量(ES)=-0.61,95%置信区间(CI):-1.20,0.02,p=0.04),在行走时,下腰椎横面 ROM 减小(ES=-0.65,95% CI:-1.24,-0.06,p=0.03)。然而,行走时下胸段横面 ROM 增加(ES=0.62,95% CI:0.04,1.21,p=0.04)。在额状面没有观察到差异。
意义:在近期有 LBP 的舞者中,特定节段和任务的脊柱运动学表现出横面运动学的改变。这可能反映了一种保护性运动策略。然而,由于观察到的差异的效应量适中,且组间差异的总数较小,因此总体而言,似乎只有脊柱运动学的细微差异才能将有 LBP 的舞者与无症状的舞者区分开来。
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