Inter- and intra-lower limb joint coordination of non-expert classical ballet dancers during tiptoe standing |
| |
| Affiliation: | 1. Research Fellow of the Japan Society for the Promotion of Science, Japan;2. Laboratory of Neurophysiology, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan;1. Japan Institute of Sports Sciences, Tokyo, Japan;2. Research Center of Health Physical Fitness and Sports, Nagoya University, Aichi, Japan;3. Research Fellow of the Japan Society for the Promotion of Science, Japan;4. Graduate School of Arts and Sciences, University of Tokyo, Tokyo, Japan;5. Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan;6. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan;1. Institute of Biomedical Engineering, National Taiwan University, Taiwan, ROC;2. Department of Orthopaedic Surgery, School of Medicine, National Taiwan University, Taiwan, ROC;3. School of Physical Therapy, China Medical University, Taiwan, ROC;4. Department of Mechanical and Automation Engineering, Kao Yuan University, Taiwan, ROC;5. Department of Radiology, Wan Fang Hospital, Taipei Medical University, Taiwan, ROC;6. Department of Radiology, School of Medicine, Taipei Medical University, Taiwan, ROC;1. ADAM Center, New York, NY, USA;2. Alvin Ailey American Dance Theater, New York, NY, USA;3. Department of Physical and Occupational Therapy, Duke University Health System, Durham, NC, USA;1. Physiotherapy Course, Federal University of Alfenas, Jovino Fernandes Sales, 2600 Avenue, Bairro Santa Clara, Alfenas, Minas Gerais, 37130-000, Brazil;2. Physiotherapy Course, Federal University of Uberlândia, R. Benjamin Constant, 1286 – Bairro Aparecida, Uberlândia, Minas Gerais, 38400-678, Brazil;1. School of Health Sciences, University of Notre Dame Australia, Australia;2. Western Australian Academy of Performing Arts, Edith Cowan University, Australia;3. School of Sport Science, Exercise and Health, University of Western Australia, Australia |
| |
| Abstract: | The main objective of this study was to compare ballet dancers’ and non-dancers’ joint coordination during tiptoe standing. Nine female non-expert ballet dancers and nine female non-dancers were asked to perform heel-toe and tiptoe standing for approximately 30 s, during which the center of pressure (COP) and kinematic data from the metatarsophalangeal, ankle, knee, and hip joints were measured. Principal component analysis was performed on the angular displacements to determine joint coordination. The weighting vectors suggested that dancers’ ankle and knee joints fluctuated in-phase in the anteroposterior direction, whereas all combinations of adjacent joints had anti-phase coordination for non-dancers. In addition, there was a significant difference in the intra-joint coordination pattern between groups. In particular, dancers’ metatarsophalangeal (MP) and ankle joints tended to sway to the left-front or right-rear. However, there were no differences between the groups in the path length or rectangular COP. These results suggest that dancers maintained quiet postures via a decrease in the mechanical degree of freedom and that postural expertise may not be determined from a traditional COP analysis, even during unstable tiptoe standing. This in-phase coordination, which has an arch-like configuration, could be characteristic of dancers’ lithe legs. |
| |
| Keywords: | Principal component analysis Center of pressure Coherence spectrum |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
