Perceived Exertion is Not Necessarily Associated with Altered Brain Activity during Exercise
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概要
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Previous studies have investigated the relationship between prefrontal cortex activation and perceived exertion during prolonged exercise. However, the effect of perceived exertion on prefrontal cortex activity is confounded by exercise intensity. Therefore, the changes in prefrontal cortex activity in response to perceived exertion remain unclear. The purpose of the present study was to investigate the relationship between the activation (oxygenation) of the prefrontal cortex and perceived exertion during constant work-rate elbow-flexion exercise with or without muscle-spindle stimulation. Ten healthy, right-handed subjects participated in the study. Near-infrared spectroscopy with probes positioned over the prefrontal cortex measured its activation throughout elbow-flexion exercise. Subjects performed sustained elbow-flexion exercise at 25-35% of the maximal voluntary contraction (MVC) with or without muscle-spindle stimulation (vibration), which can decrease perceived exertion. The ratings of perceived exertion were significantly lower during exercise with vibration (Ex-Vib) than during exercise without vibration (Ex) (p<0.05). The oxygenation of the prefrontal cortex during Ex-Vib did not significantly differ from that during Ex (p>0.05). These results indicated that perceived exertion was not necessarily associated with prefrontal cortex activation during exercise.
著者
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Osada Takuya
Department Of Preventive Medicine And Public Health Tokyo Medical University
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SATO Kohei
Research Institute of Physical Fitness, Japan Women's Physical Education
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SADAMOTO Tomoko
Research Institute of Physical Fitness, Japan Women's Physical Education
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Shibuya Kenichi
Research Institute of Physical Fitness, Japan Women's College of Physical Education
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Ueda Chihoko
Research Institute of Physical Fitness, Japan Women's College of Physical Education
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Shimizu-Okuyama Shizuyo
Institute of Physical Education, Keio University
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Saito Mitsuru
Applied Physiology Laboratory, Toyota Technological Institute
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Kagaya Atsuko
Research Institute of Physical Fitness, Japan Women's College of Physical Education
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Kamo Mifuyu
Laboratory of Exercise Physiology, Faculty of Physical Education, Japan Women's College of Physical
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Ueda Chihoko
Research Institute Of Physical Fitness Japan Women's College Of Physical Education
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Sadamoto Tomoko
Research Institute Of Physical Fitness Japan Women's College Of Physical Education
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Sato Kohei
Research Institute Of Physical Fitness Japan Women's College Of Physical Education
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Kamo Mifuyu
Laboratory Of Exercise Physiology Faculty Of Physical Education Japan Women's College Of Physic
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Kagaya Atsuko
Research Institute Of Physical Fitness Japan Women's College Of Physical Education
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Kagaya Atsuko
Research Institu Te Of Physical Fitness Japan Women's College Of Physica I Educatio
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Shibuya Kenichi
Research Institute Of Physical Fitness Japan Women's College Of Physical Education
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Shimizu-okuyama Shizuyo
Institute Of Physical Education Keio University
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Saito Mitsuru
Applied Physiology Lab. Toyota Technological Institute
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Sato Kohei
日本女子体育大学附属基礎体力研究所
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