| Effects of different duration contractions on elasticity, blood volume, and oxygen saturation of human tendon in vivo. | |
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MedLine Citation:
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PMID: 19306016 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study aimed to investigate changes in elasticity, blood volume, and oxygen saturation of tendon caused by repeat contractions of different durations. Eight male subjects performed endurance tests, which consisted of isometric plantar flexion with two different durations: a shorter contraction (SC) and a longer contraction (LC). During endurance tests and a recovery period, we measured the total hemoglobin (THb) and oxygen saturation (StO(2)) of the medial gastrocnemius muscle and Achilles tendon using near infrared spectroscopy and red laser lights. In addition, elongation of the Achilles tendon during the endurance test was measured via ultrasonography. Compared to the resting level, the THb and StO(2) of the tendon increased significantly after SC, but not after LC. On the other hand, Achilles tendon became more compliant after LC, but not after SC. These results suggested that duration of contraction affected not only elasticity, but also blood volume and oxygen saturation of tendons. |
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Authors:
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Keitaro Kubo; Toshihiro Ikebukuro; Katsutoshi Yaeshima; Hiroaki Kanehisa |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-03-21 |
Journal Detail:
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Title: European journal of applied physiology Volume: 106 ISSN: 1439-6327 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2009 Jun |
Date Detail:
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Created Date: 2009-06-01 Completed Date: 2009-09-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 445-55 Citation Subset: IM |
Affiliation:
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Department of Life Science (Sports Sciences), University of Tokyo, Komaba 3-8-1, Meguro, Tokyo, 153-8902, Japan. kubo@idaten.c.u-tokyo.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Achilles Tendon
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blood supply Ankle Joint / physiology Blood Gas Analysis Blood Volume Elasticity / physiology* Exercise / physiology* Humans Male Muscle Contraction / physiology* Muscle, Skeletal / physiology Oxygen / metabolism* Stress, Mechanical Tendons / physiology* |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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