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https://hdl.handle.net/1959.11/15844
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bryant, Adam L | en |
dc.contributor.author | Clark, Ross A | en |
dc.contributor.author | Bartold, Simon | en |
dc.contributor.author | Murphy, Aron | en |
dc.contributor.author | Bennell, Kim L | en |
dc.contributor.author | Hohmann, Erik | en |
dc.contributor.author | Marshall-Gradisnik, Sonya | en |
dc.contributor.author | Payne, Craig | en |
dc.contributor.author | Crossley, Kay M | en |
dc.date.accessioned | 2014-10-09T11:25:00Z | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Journal of Applied Physiology, 105(4), p. 1035-1043 | en |
dc.identifier.issn | 1522-1601 | en |
dc.identifier.issn | 8750-7587 | en |
dc.identifier.uri | https://hdl.handle.net/1959.11/15844 | - |
dc.description.abstract | The purpose of this study was to elucidate the effect of normal fluctuating [nonmonophasic oral contraceptive pill (MOCP) users] and low, consistent (MOCP users) endogenous plasma estrogen levels on the strain behavior of the Achilles tendon in vivo. Twenty women (age 28.0 ± 4.2 yr, height 1.67 ± 0.07 m, mass 61.6 ± 6.8 kg) who had been using the MOCP for at least 12 mo together with 20 matched women who were non-MOCP users (age 31.9 ± 7.3 yr, height 1.63 ± 0.05 m, mass 62.5 ± 5.9 kg) participated in this study. Non-MOCP users were tested at the time of lowest (menstruation) and highest (≈ovulation) estrogen, whereas MOCP users, who exhibited constant and attenuated endogenous estrogen levels, were tested at day 1 and day 14 of their cycle. At each test session, maximal isometric plantarflexion efforts were performed on a calf-raise apparatus while synchronous real-time ultrasonography of the triceps surae aponeurosis was recorded. Achilles tendon strain (%) was calculated by dividing tendon displacement during plantarflexion by resting tendon length. Repeated measures ANOVA revealed a significant (P > 0.05) main effect of subject group with significantly lower Achilles strain (25.5%) in the MOCP users compared with the non-MOCP users. In conclusion, acute fluctuations in plasma estrogen across the menstrual cycle in non-MOCP users did not alter the strain behavior of the Achilles tendon. Conversely, long-term exposure to attenuated estrogen in MOCP users resulted in a decrease in Achilles tendon strain, which is thought to be attributed to the effects of endogenous estrogen on collagen synthesis. These findings have a number of important functional and clinical implications. | en |
dc.language | en | en |
dc.publisher | American Physiological Society | en |
dc.relation.ispartof | Journal of Applied Physiology | en |
dc.title | Effects of estrogen on the mechanical behavior of the human Achilles tendon in vivo | en |
dc.type | Journal Article | en |
dc.identifier.doi | 10.1152/japplphysiol.01281.2007 | en |
dc.subject.keywords | Sports Medicine | en |
dc.subject.keywords | Exercise Physiology | en |
local.contributor.firstname | Adam L | en |
local.contributor.firstname | Ross A | en |
local.contributor.firstname | Simon | en |
local.contributor.firstname | Aron | en |
local.contributor.firstname | Kim L | en |
local.contributor.firstname | Erik | en |
local.contributor.firstname | Sonya | en |
local.contributor.firstname | Craig | en |
local.contributor.firstname | Kay M | en |
local.subject.for2008 | 110604 Sports Medicine | en |
local.subject.for2008 | 110602 Exercise Physiology | en |
local.subject.seo2008 | 970111 Expanding Knowledge in the Medical and Health Sciences | en |
local.subject.seo2008 | 970106 Expanding Knowledge in the Biological Sciences | en |
local.profile.school | Science and Technology | en |
local.profile.school | Science and Technology | en |
local.profile.school | Science and Technology | en |
local.profile.school | Office of Faculty of Science, Ag, Business and Law | en |
local.profile.school | Science and Technology | en |
local.profile.school | Science and Technology | en |
local.profile.school | Science and Technology | en |
local.profile.school | Science and Technology | en |
local.profile.school | Science and Technology | en |
local.profile.email | amurph31@une.edu.au | en |
local.output.category | C1 | en |
local.record.place | au | en |
local.record.institution | University of New England | en |
local.identifier.epublicationsrecord | une-20140929-123846 | en |
local.publisher.place | United States of America | en |
local.format.startpage | 1035 | en |
local.format.endpage | 1043 | en |
local.identifier.scopusid | 55449132588 | en |
local.peerreviewed | Yes | en |
local.identifier.volume | 105 | en |
local.identifier.issue | 4 | en |
local.contributor.lastname | Bryant | en |
local.contributor.lastname | Clark | en |
local.contributor.lastname | Bartold | en |
local.contributor.lastname | Murphy | en |
local.contributor.lastname | Bennell | en |
local.contributor.lastname | Hohmann | en |
local.contributor.lastname | Marshall-Gradisnik | en |
local.contributor.lastname | Payne | en |
local.contributor.lastname | Crossley | en |
dc.identifier.staff | une-id:amurph31 | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.identifier.unepublicationid | une:16081 | en |
local.identifier.handle | https://hdl.handle.net/1959.11/15844 | en |
dc.identifier.academiclevel | Academic | en |
local.title.maintitle | Effects of estrogen on the mechanical behavior of the human Achilles tendon in vivo | en |
local.output.categorydescription | C1 Refereed Article in a Scholarly Journal | en |
local.search.author | Bryant, Adam L | en |
local.search.author | Clark, Ross A | en |
local.search.author | Bartold, Simon | en |
local.search.author | Murphy, Aron | en |
local.search.author | Bennell, Kim L | en |
local.search.author | Hohmann, Erik | en |
local.search.author | Marshall-Gradisnik, Sonya | en |
local.search.author | Payne, Craig | en |
local.search.author | Crossley, Kay M | en |
local.uneassociation | Unknown | en |
local.year.published | 2008 | en |
Appears in Collections: | Journal Article |
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