Effect of Linear Polarized Near-infrared Light Irradiation and Light Exercise on Muscle Performance

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概要

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• This study aimed to determine the effect of active warm-up by local muscle light exercise and passive warm-up by polarized light irradiation on skin and muscle temperatures and forearm muscle performance (muscle strength, power, endurance, and controlled force-exertion). Ten healthy males performed various grip tests before and after active (local muscle light exercise) and passive (linear polarized near-infrared light irradiation) warm-ups. An active warm-up involved intermittent gripping exercise (contraction: 1 second and relaxation: 1 second) for 10 minutes using a sponge. A passive warm-up consisted of polarized light irradiation to the forearm (superficial digital flexor) for 10 minutes (irradiation: 5 seconds and rest: 1 second). Skin and muscle temperatures were measured during both warm-ups. Skin and muscle temperatures increased significantly after 5 minutes of local muscle light exercise and after 10 minutes of polarized light irradiation. Temperatures were significantly higher after 6 minutes of local muscle light exercise than after 6 minutes of polarized light irradiation. There were no significant differences of muscle strength, power, and controlled force-exertion before and after either warm-up. Average force outputs in all conditions significantly decreased with exertion time, and at 30, 60, 90, and 120 seconds they were higher in both warm-up conditions than in the non-warm-up condition. In conclusion, both warm-ups may contribute to improve muscle endurance performance in the decreasing force phase.

• 2011-05-31

著者

• Demura Shinichi

  Kanazawa Univ. Graduate School Of Natural Sci. & Technol.

• Yamaji Shunsuke

  University Of Fukui

• Aoki Hiroki

  Kanazawa College Of Art

• DEMURA Tomohiro

  Kanazawa University, Graduate School of Natural Science & Technology

• UCHIDA Yuu

  Kanazawa University, Graduate School of Human and Socio-Environment Studies

• Uchida Yuu

  Kanazawa University Graduate School Of Human And Socio-environment Studies

• Demura Tomohiro

  Kanazawa University Graduate School Of Natural Science & Technology

• Yamaji Shunsuke

  University Fukui Faculty Of Medical Sciences

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