Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences)
Online ISSN : 1881-7718
Print ISSN : 0484-6710
ISSN-L : 0484-6710
Volume 46 , Issue 5
Showing 1-14 articles out of 14 articles from the selected issue
  • Type: Cover
    2001 Volume 46 Issue 5 Pages Cover17-
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
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  • Type: Cover
    2001 Volume 46 Issue 5 Pages Cover18-
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    Download PDF (25K)
  • Type: Appendix
    2001 Volume 46 Issue 5 Pages App6-
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
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  • Atsuko Kagaya
    Type: Article
    2001 Volume 46 Issue 5 Pages 429-442
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    The recent development of non-invasive ultrasound for studying blood flow has contributed to knowledge about changes in blood flow to exercising muscle. Using this method, the vessel diameter of conduit arteries, such as the femoral artery and brachial artery, was measured. The diameter of the brachial artery tncreased as handgrip exercise was prolonged, though no changes in diameter were observed in the femoral artery during knee extension exercise. Blood flow to the muscle was impeded mechanically by muscle contraction due to the increased intramuscular pressure even at low intensity (10% MVC). A greater reduction of muscle blood flow was demonstrated during the concentric phase, and it recovered toward the baseline during the eccentric phase. The effect of geometrical changes in muscle fibers on muscle circulation remained to be studied. The Doppler ultrasound method with good time resolution allowed us to investigate the time course of blood flow changes during exercise. The results of previous studies indicated a faster adaptation of muscle blood flow at the onset of exercise, followed by a steady state or gradual increase toward the end of exercise, depending on the exercise intensity. Redistribution of blood flow between active muscles has been an issue of interest; several studies indicated blood flow reduction during combined exercise and others did not. Further studies should be conducted focusing on the combination of the exercise intensity of individual muscle recruited during exercise. Muscle blood flow plays a key role in determining muscle endurance capacity. However, it is still unknown how high muscle blood flow increases during exercise. Accumulation of knowledge about exercise-induced maximal blood flow is needed in relation to training, exercise mode, exercise intensity, exercise frequency and contraction/relaxation schedule during the duty cycle.
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  • Masanobu Wada, Shuichiro Inashima, Toshihiro Yasuda, Satoshi Matsunaga
    Type: Article
    2001 Volume 46 Issue 5 Pages 443-459
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    Repeated contractions of skeletal muscle lead to a decline of force known as fatigue. The exact cause of muscular fatigue probably involves numerous factors which influence force production in a manner dependent on muscle fiber type and activation pattern. However, a growing amount of evidence implicates alteration of intracellular Ca^2+ handling as a major contributor to fatigue. These changes are known to occur secondary to reductions in the rates of Ca^2+ uptake and release by the sarcoplasmic reticulum (SR). In this brief review, we focus on two major aspects: 1) molecular mechanisms of the Ca^2+ uptake and release process, focusing on Ca^2+-ATPase protein and the ryanodine receptor; and 2) several factors that may be responsible for dysfunction of the SR resulting from contractile activity. Factors that might account for diminished function of the SR include a fall in internal pH, increased Ca^2+ concentration, modification by reactive oxygen species, depletion of high-energy phosphate, and accumulation of inorganic phosphate.
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  • Li Jin Yu, Li Yongliang
    Type: Article
    2001 Volume 46 Issue 5 Pages 461-466
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    Anthropometry measurements (3-15 items), health status (3-17 items) and physical fitness (5-9 items) have been researched every 5 years since 1979 in China. From one hundred eighty thousands to five hundred forty thousands students (aged from 7 to 22-years) participated in the survey. The results were analyzed and utilized as the information for the school policies in China on the national standard of physical fitness or school lunch.
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  • Tetsuya Sagawa
    Type: Article
    2001 Volume 46 Issue 5 Pages 467-475
    Published: September 10, 2001
    Released: September 27, 2017
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  • Type: Appendix
    2001 Volume 46 Issue 5 Pages 477-478
    Published: September 10, 2001
    Released: September 27, 2017
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  • Type: Appendix
    2001 Volume 46 Issue 5 Pages 479-490
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
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  • Type: Appendix
    2001 Volume 46 Issue 5 Pages 491-496
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
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  • Type: Bibliography
    2001 Volume 46 Issue 5 Pages 497-
    Published: September 10, 2001
    Released: September 27, 2017
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  • Type: Appendix
    2001 Volume 46 Issue 5 Pages 501-
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    Download PDF (242K)
  • Type: Cover
    2001 Volume 46 Issue 5 Pages Cover19-
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    Download PDF (22K)
  • Type: Cover
    2001 Volume 46 Issue 5 Pages Cover20-
    Published: September 10, 2001
    Released: September 27, 2017
    JOURNALS FREE ACCESS
    Download PDF (22K)
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