1999 Fiscal Year Final Research Report Summary
Influence of Leg and Trunk Muscle on Changing Walking Posture
| Project/Area Number |
09680137
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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 | KANSAI MEDICAL UNIVERSITY |
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Principal Investigator |
OKAMOTO Tsutomu KANSAI MEDICAL UNIVERSITY, FACULTY OF MEDICINE, PROFESSOR, 医学部, 教授 (50077624)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Electromyography / Changing Walking Posture / Leg and Trunk Muscles / Aging |
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| Research Abstract |
The purpose of this study is to elucidate electromyographically influence of leg and trunk muscle activities on changing posture during walking. And also we examined prophylaxis against changing walking posture due to aging.
The result of our experiment clearly shows that markedly forward lean on the trunk, slight squat, short step length, slow speed and shuffling are signs of old person walking.
The antigravity leg muscles (the hamstrings) in stance phase showed activity associated with the body forward. The knee extensor (the vastus medialis) in stance phase acted for slightly flexed knee to maintain balance. The non-burst discharge pattern of the tibialis anterior prior to heel contact associated with shuffling gait. The non-strong burst discharge pattern of the lateral gastrocnemius in the latter part of stance phase showed short step length and slow speed.
As to prophylaxis against changing walking posture due to aging, we conclude that it is effective to walk in longer-stride fast walking with the body upright. Because the excessive antigravity muscles activities of the leg tend to decrease or disappear by the body upright. At the ankle, the tibialis anterior prior to heel contact and the lateral gastrocnemius in the latter part of stance phase showed strong activities like the adult pattern by longer-stride fast walking.
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