| Conditioning of the Achilles tendon via ankle exercise improves correlations between sonographic measures of tendon thickness and body anthropometry. | |
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MedLine Citation:
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PMID: 21393469 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Although conditioning is routinely used in mechanical tests of tendon in vitro, previous in vivo research evaluating the influence of body anthropometry on Achilles tendon thickness have not considered its potential effects on tendon structure. This study evaluated the relationship between Achilles tendon thickness and body anthropometry in healthy adults both prior to and following resistive ankle plantarflexion exercise. A convenience sample of thirty healthy male adults underwent sonographic examination of the Achilles tendon in addition to standard anthropometric measures of stature and body weight. A 10-5 MHz linear array transducer was used to acquire longitudinal sonograms of the Achilles tendon, 20 mm proximal to the tendon insertion. Participants then completed a series (90-100 repetitions) of conditioning exercises against an effective resistance between 100% and 150% bodyweight. Longitudinal sonograms were repeated immediately on completion of the exercise intervention and anteroposterior Achilles tendon thickness determined. Achilles tendon thickness was significantly reduced immediately following conditioning exercise (t = 9.71, P< .001), resulting in an average transverse strain of -18.8%. In contrast to pre-exercise measures, Achilles tendon thickness was significantly correlated with body weight (r = 0.72, P< .001) and to a lesser extent height (r = 0.45, P = .01) and BMI (r = 0.63, P< .001) following exercise. Conditioning of the Achilles tendon via resistive ankle exercises induces alterations in tendon structure that substantially improve correlations between Achilles tendon thickness and body anthropometry. It is recommended that conditioning exercises, which standardize the load history of tendon, are employed prior to measurements of sonographic tendon thickness in vivo. |
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Authors:
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Scott C Wearing; Nicole L Grigg; Sue L Hooper; James E Smeathers |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-10 |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: - ISSN: 1522-1601 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1Bond University. |
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