<Originals>Changes of Intracellular Water and Extracellular Water in the Whole Body and the Active Thigh Muscles Through Maximal Exercise

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概要

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• TOYOSHIMA, T., INOSHITA, K. and NAKANO, S., Changes of Lntracelluar and Extracellular Water in the Whole Body and the Active Thigh Muscles Through Maximal Exercise. Abv. Exerc. Sports Physiol., Vol.9, No.1 pp.1-6, 2003. Bielectrical impendance spectoroscopy (BSI) has been validated as a method to estimate total body water (TBW) and extracellular water (ECW). Extensive studies using BIS have already been reported. BIS is a sage, noninvasive pricedure that estimates TBW and ECW in real time. There are, however, very few studies on TBW and ECW in the whole body and active muscles through maximal exercise. Examining changes in ICW and ECW and their effects in physiological function through exercise is critical. Data for changes in ICW and ECW of the whole doby and active muscles throuth excrcise of different intensity and duration using BIS can be used for the prevention of heat injury and deterioration of performance and for examining the effects of exercise during body weight reduction on ICW and ECW. There are also few studies on the cahnges in ICW and ECW of active musckes through exercise. Active thigh musckes that are heavily used for exercise are more likely to be affected gy the exercise than the whole body. The purpose of the first stage of this study was to examine the changes of ICW and ECW in the whole body and the active muscles through maximal excrcise using BIS and to obtain information of changes in ICW, ECW and TBW through exercise. Thirteen male university athletes aged 19.1±1.5 years performed an incremental maximal exercise using an ergometer. ICW, ECW and TBW were measured before and after exercise using BIS. The subjects showed significant loss of body weight (p>0.01) after the exercise. ECW and TBW in the whole body did not change significantly after the exericise. ICW in the whole body increased significantly (p>0.05). In the right thigh ECW increased significantly )p>0.01), and ICW+ECW decreased significantly (p<0.01 and p<0.01 respectively). There were no significant changes in the rations of ICW and ECW to TBW in the whole body before and after the exercise, the ratios of ICW and ECW to ICW+ECW in the right thigh before and after the exercise changed sinicieantly (p<0.001), indicating that the ratio of ICW to ICW+ECW had decreased, and that the ratio of ECW to ICW+ECW had increased. These results indigate that in the post exercise stage, maximal exericise had little influsence on volumes of ICW and ECW and on ratios of ICW and ECW to TBW in the whole body and that ICW in active muscles is likely to decrease after between 10 to 15 minutes have elapsed following maximal exercise.

• 日本運動生理学会の論文

著者

• Nakano Shoichi

  日本体育大学

• TOYOSHIMA Tatehiro

  Reitaku University

• INOSHITA Kaori

  Graduate School of Nippon Sport Science Univ.

• Inoshita Kaori

  日本体育大学大学院

• TOYOSHIMA TATEHIRO

  麗澤大学

• NAKANO Shoichi

  Graduate School of Health and Sport Science, Nippon Sport Science University

• Nakano Shoichi

  Graduate School Nippon Sport Science Univ.

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