2000 Fiscal Year Final Research Report Summary
Muscle Strength and Thickness of Ankle Plantar Flexors and Ankle Dorsiflexors in Females Aged 50-89.
| Project/Area Number |
11680066
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
体育学
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| Research Institution | Osaka University of Health and Sport Sciences |
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Principal Investigator |
KANEKO Masahiro Department of Physical Education, Osaka University of Health and Sport Sciences Professor, 体育学部, 教授 (00067232)
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| Co-Investigator(Kenkyū-buntansha) |
SHISHIKURA Yasuo Department of Physical Education, Osaka University of Health and Sport Sciences Professor, 体育学部, 教授 (60067254)
YAMAZAKI Takeshi Department of Physical Education, Osaka University of Health and Sport Sciences Professor, 体育学部, 教授 (50067237)
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| Project Period (FY) |
1999 – 2000
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| Keywords | muscle strength / elderly people / ankle joint / physical fitness |
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| Research Abstract |
The muscle strength and muscle thickness of the knee extensors, ankle plantar flexors and ankle dorsiflexors were determined on 106 healthy females aged from 50 to 89 years old. The maximal isometric strength of knee extensors was measured at a right angle in a sitting position. The isometric strength of the ankle plantar- and dorsi-flexors was measured in a sitting position as well using a specially designed apparatus. The maximal plantar- and dorsi-flexion forces were exerted maximally and alternately at the right angle of the ankle joint. The muscle thickness was determined using a B-mode ultrasonic apparatus.
The maximum strength significantly decreased with age in all muscle groups. The strength appeared to be associated with significant reductions in the thickness of each respective muscle tissue. The ratio of muscle strength / (thickness)^2 tended to increase in the knee extensors, whereas it decreased in the ankle plantar flexors, and was almost unchanged in the ankle dorsiflexors. These findings suggested that the effects of aging on specific muscle tension varied among muscles.
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