2016 Fiscal Year Final Research Report
Mechanisms for improvement of joint range of motion after an acute bout of stretching exercise
| Project/Area Number |
15K12646
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Sports science
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| Research Institution | National Institute of Fitness and Sports in Kanoya |
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Principal Investigator |
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| Research Collaborator |
HIRATA Kosuke 鹿屋体育大学, 特任研究員
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 関節可動域 / 筋スティフネス / 超音波剪断波エラストグラフィ |
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| Outline of Final Research Achievements |
The purpose of the present study was to elucidate the factors responsible for the improvement of ankle dorsiflexion range of motion (ROM) after an acute bout of static stretching, using ultrasound shear wave elastography. After the static stretching, the maximum dorsiflexion ROM was significantly increased. The stretching induced a significant reduction in passive stiffness of the medial gastrocnemius, but not in that of the lateral gastrocnemius and soleus. The slack angle of the Achilles tendon was significantly shifted to more dorsiflexed position. Additional experiment revealed that the passive stiffness of the medial gastrocnemius at a given fascicle length was significantly reduced. These findings suggest that both the reduction in passive fascicle stiffness and the shift in slack angle of the Achilles tendon contribute to the increased ROM.
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| Free Research Field |
トレーニング科学
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