Rocha Priscila, McClelland Jodie, Sparrow Tony, Morris Meg E
School Allied Health, Department of Physiotherapy, College Science, Health & Engineering, La Trobe University, Bundoora, Australia; and CAPES Foundation, Ministry of Education of Brazil, Brasília, Brazil, School Allied Health, Department of Physiotherapy, La Trobe University, Bundoora, Melbourne, Victoria 3086, Australia;, Email:
School Allied Health, Department of Physiotherapy, College Science, Health & Engineering, La Trobe University, Bundoora, Australia.
J Dance Med Sci. 2017 Sep 15;21(3):123-129. doi: 10.12678/1089-313X.21.3.123.
Although tap dancing is a popular dance genre, little is known about the biomechanics and motor control of this complex motor skill. We conducted a detailed 3D kinematic analysis of movement timing, amplitude, and symmetry in three experienced female tap dancers. Kinematic analyzes of three basic tap dance steps (nerve beats, brush brush stamps, and heel ball walks) were undertaken. A 10-camera Vicon motion analysis system was used to collect the data. The results showed the feet and knees to play a major role in movement execution. Each step required at least 10° of ankle motion (range: 10° to 66.8°). Knee range of motion varied from 1.3° to 147.4°. For each of the dance steps the hips showed the smallest amplitude of movement, which was not greater than 21° in two out of the three dance steps. Analyzes of movement timing showed that each of the dance steps was fast, accurate, and well synchronized. The nerve beats took on average 0.50 seconds, the brush brush stamps 1.36 seconds, and the heel ball walks 4.03 seconds. A high degree of symmetry in total movement amplitude was evident at the ankles,knees, and hips for the nerve beats and heel ball walks. There was a mild degree of asymmetry at the hip for the brush brush stamp steps (symmetry index 90%). The results showed that experienced dancers had very high levels of proficiency in controlling movement amplitude, timing, and inter-limb coordination across the ankles, knees, and hips. This resulted in skilled, fast, and well executed dance steps.
尽管踢踏舞是一种广受欢迎的舞蹈类型，但对于这种复杂运动技能的生物力学和运动控制却知之甚少。我们对三名经验丰富的女性踢踏舞者的动作时间、幅度和对称性进行了详细的三维运动学分析。对三个基本踢踏舞步（神经节拍、刷刷跺步和足跟球步）进行了运动学分析。使用一个10台摄像机的Vicon运动分析系统来收集数据。结果表明，脚和膝盖在动作执行中起主要作用。每个舞步至少需要10°的踝关节运动（范围：10°至66.8°）。膝关节的运动范围从1.3°到147.4°不等。对于每个舞步，臀部的运动幅度最小，在三个舞步中的两个中不超过21°。动作时间分析表明，每个舞步都快速、准确且同步良好。神经节拍平均用时0.50秒，刷刷跺步用时1.36秒，足跟球步用时4.03秒。在神经节拍和足跟球步中，踝关节、膝关节和臀部的总运动幅度呈现出高度对称性。在刷刷跺步中，臀部存在轻度不对称（对称指数90%）。结果表明，经验丰富的舞者在控制踝关节、膝关节和臀部的运动幅度、时间以及肢体间协调方面具有非常高的熟练程度。这使得舞步熟练、快速且执行良好。
