How spotting technique affects dizziness and postural stability after full-body rotations in dancers

IF 1.6 3区 心理学 Q4 NEUROSCIENCES Human Movement Science Pub Date : 2024-04-06 DOI:10.1016/j.humov.2024.103211
Andrea Schärli , Heiko Hecht , Fred W. Mast , Ernst-Joachim Hossner
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Abstract

Consecutive longitudinal axis rotations are very common in dance, ranging from head spins in break dance to pirouettes in ballet. They pose a rather formidable perceptuomotor challenge – and hence form an interesting window into human motor behaviour – yet they have been scarcely studied. In the present study, we investigated dancers' dizziness and postural stability after consecutive rotations. Rotations were performed actively or undergone passively, either with or without the use of a spotting technique in such an order that all 24 ordering options were offered at least once and not more than twice.

Thirty-four dancers trained in ballet and/or contemporary dance (aged 27.2 ± 5.1 years) with a mean dance experience of 14.2 ± 7.1 years actively performed 14 revolutions in passé or coupé positions with a short gesture leg “foot down” after each revolution. In addition, they were passively turned through 14 revolutions on a motor-driven rotating chair. Participants' centre-of-pressure (COP) displacement was measured on a force-plate before and after the rotations. Moreover, the dancers indicated their subjective feeling of dizziness on a scale from 0 to 20 directly after the rotations. Both the active and passive conditions were completed with and without the dancers spotting.

As expected, dizziness was worse after rotations without the adoption of the spotting technique, both in active and passive rotations. However, the pre-post difference in COP area after active rotations was unaffected by spotting, whereas in the passive condition, spotting diminished this difference. Our results thus suggest that adopting the spotting technique is a useful tool for dizziness reduction in dancers who have to perform multiple rotations. Moreover, spotting appears most beneficial for postural stability when it involves less postural control challenges, such as when seated on a chair and occurs in situations with limited somatosensory feedback (e.g., from the cutaneous receptors in the feet). However, the unexpected finding that spotting did not help postural stability after active rotations needs to be investigated further in future studies, for example with a detailed analysis of whole-body kinematics and eye-tracking.

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定点技术如何影响舞蹈演员全身旋转后的头晕和姿势稳定性
连续的纵轴旋转在舞蹈中非常常见,从霹雳舞中的头旋到芭蕾舞中的回旋,不一而足。它们构成了一项相当艰巨的知觉运动挑战,因此也是了解人类运动行为的一个有趣窗口,但对它们的研究却寥寥无几。在本研究中,我们调查了舞者在连续旋转后的眩晕感和姿势稳定性。34 名接受过芭蕾舞和/或现代舞训练的舞者(年龄为 27.2 ± 5.1 岁),平均舞蹈经验为 14.2 ± 7.1 年。他们以 Passé 或 coupé 姿势主动进行了 14 次旋转,每次旋转后都做了一个 "脚向下 "的短手势。此外,他们还被动地在电机驱动的旋转椅上转了 14 圈。旋转前后,参与者的压力中心(COP)位移在测力板上进行了测量。此外,舞者还在旋转后直接用 0 至 20 分的量表表示自己的主观眩晕感。正如预期的那样,无论是主动旋转还是被动旋转,在没有采用定点技术的情况下,旋转后的头晕感都更严重。然而,主动旋转后 COP 面积的前后差异不受定点技术的影响,而在被动条件下,定点技术则缩小了这一差异。因此,我们的研究结果表明,对于需要进行多次旋转的舞者来说,采用定点技术是减少头晕的有效工具。此外,在姿势控制挑战较小的情况下,如坐在椅子上,以及在体感反馈(如来自脚部的皮肤感受器)有限的情况下,定点技术似乎对姿势稳定性最有益处。然而,意外的发现是,点动对主动旋转后的姿势稳定性没有帮助,这需要在今后的研究中进一步探讨,例如通过对全身运动学和眼动跟踪进行详细分析。
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来源期刊
Human Movement Science
Human Movement Science 医学-神经科学
CiteScore
3.80
自引率
4.80%
发文量
89
审稿时长
42 days
期刊介绍: Human Movement Science provides a medium for publishing disciplinary and multidisciplinary studies on human movement. It brings together psychological, biomechanical and neurophysiological research on the control, organization and learning of human movement, including the perceptual support of movement. The overarching goal of the journal is to publish articles that help advance theoretical understanding of the control and organization of human movement, as well as changes therein as a function of development, learning and rehabilitation. The nature of the research reported may vary from fundamental theoretical or empirical studies to more applied studies in the fields of, for example, sport, dance and rehabilitation with the proviso that all studies have a distinct theoretical bearing. Also, reviews and meta-studies advancing the understanding of human movement are welcome. These aims and scope imply that purely descriptive studies are not acceptable, while methodological articles are only acceptable if the methodology in question opens up new vistas in understanding the control and organization of human movement. The same holds for articles on exercise physiology, which in general are not supported, unless they speak to the control and organization of human movement. In general, it is required that the theoretical message of articles published in Human Movement Science is, to a certain extent, innovative and not dismissible as just "more of the same."
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