跳躍選手の脛骨の形態と骨強度 : 骨幹部断面の重心を中心とする64方向についてのpQCT解析  [in Japanese] JUMPER'S TIBIA ASSESSED ALONG 64 DIRECTIONS CENTERING CENTER OF GRAVITY OF THE BONE BY pQCT  [in Japanese]

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Abstract

Side to side difference in tennis players' mid-radius and cross-sectional study on mid-tibia of jumpers and sedentary controls suggest that the improvement of mechanical properties of cortical bone in response to long-term exercise is related to geometric adaptation and not to volumetric bone mineral density. In the present study, geometric and mechanical properties of right tibia were estimated along 64 directions centering center of gravity of the bone on cross-sectional peripheral quantitative computed tomography (pQCT) images. The tibias of 17 jumpers (7 females, 10 males) and 15 controls (8 females, 7males), aged 18-23, were scanned at mid site using pQCT. Periosteal and endocortical radius were larger, cortical thickness was thicker, and mechanical properties (moment of inertia of area and strength strain index) were greater in jumpers compared to those of controls. The differences in cortical thickness between the two groups were dependent on direction of measurement. Defined a direction from tibia's center of gravity to fibula's as 0°, difference in the cortical thickness between jumpers and controls was the greatest at around 240°. Along this direction, differences in mechanical properties were also the most significant, suggesting that the site-specific adaptation of bone to long-term exercise is due to geographical relation of bone to muscle.

Journal

  • Japanese Journal of Physical Fitness and Sports Medicine

    Japanese Journal of Physical Fitness and Sports Medicine 53(1), 123-130, 2004-02-01

    The Japanese Society of Physical Fitness and Sport Medicine

References:  25

Cited by:  1

Keywords

Codes

  • NII Article ID (NAID)
    110001915245
  • NII NACSIS-CAT ID (NCID)
    AN00137986
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0039906X
  • NDL Article ID
    6851705
  • NDL Source Classification
    ZF21(教育--体育)
  • NDL Call No.
    Z7-301
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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