Key motion characteristics of side-step movements in hip-hop dance and their effect on the evaluation by judges
Key motion characteristics of side-step movements in hip-hop dance and their effect on the evaluation by judges
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DOI：
10.1080/14763141.2016.1158861
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发表时间：
2016-01-01
影响因子：
2.2
通讯作者：
Ikegami, Yasuo
中科院分区：
文献类型：
--
作者：
Sato, Nahoko;Nunome, Hiroyuki;Ikegami, Yasuo
在嘻哈舞中，区分舞者技能水平和影响评委评价的运动元素尚未明确确定。本研究旨在从街舞的侧步动作中提取这些动作特征。八名专家舞者和八名非专家舞者表演侧步动作，并使用动作捕捉系统进行记录。九位经验丰富的评委对舞者的表演进行了评估。计算了几个参数，包括关节角度(颈部、躯干、髋关节、膝关节和面部倾斜度)的运动范围(ROM)和这些角度运动之间的相位延迟。脖子运动和身体其他部位之间四分之一周期的相位延迟，只有专业舞者才能看到，这是一个可以区分舞者技能水平的因素。专家舞者的这一特征导致了面部倾斜时比非专家舞者更大的ROM值。此外，专家在水平方向上展示了从下到上的分段序列，而非专家没有展示任何这样的顺序运动。在这些运动学参数中，只有面部倾斜的ROM值与裁判得分高度相关，被认为是侧步动作中最吸引人的因素。
In hip-hop dance, the elements of motion that discriminate the skill levels of dancers and that influence the evaluations by judges have not been clearly identified. This study set out to extract these motion characteristics from the side-step movements of hip-hop dancing. Eight expert and eight non-expert dancers performed side-step movements, which were recorded using a motion capture system. Nine experienced judges evaluated the dancers' performances. Several parameters, including the range of motion (ROM) of the joint angles (neck, trunk, hip, knee, and face inclination) and phase delays between these angular motions were calculated. A quarter-cycle phase delay between the neck motion and other body parts, seen only in the expert dancers, is highlighted as an element that can distinguish dancers' skill levels. This feature of the expert dancers resulted in a larger ROM during the face inclination than that for the non-expert dancers. In addition, the experts exhibited a bottom-to-top segmental sequence in the horizontal direction while the non-experts did not demonstrate any such sequential motion. Of these kinematic parameters, only the ROM of the face inclination was highly correlated to the judging score and is regarded as being the most appealing element of the side-step movement.