Harkness Center for Dance Injuries, NYU Langone Health, 614 2ndAv, Suite G, 2nd Floor, New York, NY 10016, USA.
School of Behavioural and Health Sciences, Australian Catholic University, Daniel Mannix Building, 17 Young St, Fitzroy, VIC 3065, Australia.
Gait Posture. 2021 Jul;88:198-202. doi: 10.1016/j.gaitpost.2021.05.032. Epub 2021 Jun 6.
The spinal biomechanics of dance tasks have received little study and no studies have used a multi-segmented spinal model. Knowledge of how the segments of the spine move may be useful to the dance clinician and dance educator.
What is the direction and amount of motion of the primary segments of the spine in elite dancers during an arabesque and a passé?
This observational study examined 59 elite dancers performing an arabesque and a passé using a three-dimensional motion analysis system with the trunk divided into a series of five segments: pelvis, lower lumbar, upper lumbar, lower thoracic and upper thoracic spine.
For the arabesque, all spinal segments moved in the same direction within each plane and the majority of total spinal motion occurred in the thoracic spine. Thoracic segments were at or near end range position at completion of the arabesque. For the passé, the spinal segments moved in different directions within each plane and the majority of total spinal motion occurred in the lumbar spine.
Dance clinicians and dance educators may benefit from the knowledge that thoracic hypomobility in any plane may limit arabesque performance and that attempts to instruct dancers to achieve a position of passé without flexion of the lumbar spine may be a valid aesthetic ideal but also an unrealistic functional expectation.
舞蹈任务的脊柱生物力学尚未得到充分研究，也没有研究使用多节段脊柱模型。了解脊柱各节段的运动方式可能对舞蹈临床医生和舞蹈教育者有用。
在阿拉贝斯克和旁提动作中，优秀舞者的脊柱主要节段的运动方向和幅度是怎样的？
本观察性研究使用三维运动分析系统检查了 59 名优秀舞者完成的阿拉贝斯克和旁提动作，该系统将躯干分为五个节段：骨盆、下腰椎、上腰椎、下胸椎和上胸椎。
在阿拉贝斯克中，每个平面内的所有脊柱节段都向同一方向移动，并且大部分脊柱总运动发生在胸椎。完成阿拉贝斯克时，胸椎段处于或接近末端位置。在旁提中，每个平面内的脊柱节段移动方向不同，大部分脊柱总运动发生在腰椎。
舞蹈临床医生和舞蹈教育者可能受益于以下知识，即任何平面的胸椎活动度降低可能会限制阿拉贝斯克的表现，而试图指导舞者在不弯曲腰椎的情况下达到旁提的位置，可能是一个合理的美学理想，但也是一个不切实际的功能期望。
