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dc.contributor.authorHunter, Gary R.
dc.contributor.authorScott Bickel, C.
dc.contributor.authorCorral, Pedro Del
dc.contributor.authorByrne, Nuala M.
dc.contributor.authorHills, Andrew P.
dc.contributor.authorEnette Larson-Meyer, D.
dc.contributor.authorBamman, Marcas M.
dc.contributor.authorNewcomer, Bradley R.
dc.date.accessioned2017-05-03T14:37:14Z
dc.date.available2017-05-03T14:37:14Z
dc.date.issued2011
dc.date.modified2012-04-10T22:30:02Z
dc.identifier.issn14396319
dc.identifier.doi10.1007/s00421-010-1694-1
dc.identifier.urihttp://hdl.handle.net/10072/44344
dc.description.abstractAging is associated with loss of endurance; however, aging is also associated with decreased fatigue during maximal isometric contractions. The aims of this study were to examine the relationship between age and walking endurance (WE) and maximal isometric fatigue (MIF) and to determine which metabolic/fitness components explain the expected age effects on WE and MIF. Subjects were 96 pre-menopausal women. Oxygen uptake (walking economy) was assessed during a 3-mph walk; aerobic capacity and WE by progressive treadmill test; knee extension strength by isometric contractions, MIF during a 90-s isometric plantar flexion (muscle metabolism measured by 31P MRS). Age was related to increased walking economy (low VO2, r = −0.19, P < 0.03) and muscle metabolic economy (force/ATP, 0.34, P = 0.01), and reduced MIF (−0.26, P < 0.03). However, age was associated with reduced WE (−0.28, P < 0.01). Multiple regression showed that muscle metabolic economy explained the age-related decrease in MIF (partial r for MIF and age −0.13, P = 0.35) whereas walking economy did not explain the age-related decrease in WE (partial r for WE and age −0.25, P < 0.02). Inclusion of VO2max and knee endurance strength accounted for the age-related decreased WE (partial r for WE and age = 0.03, P > 0.80). In premenopausal women, age is related to WE and MIF. In addition, these results support the hypothesis that age-related increases in metabolic economy may decrease MIF. However, decreased muscle strength and oxidative capacity are related to WE.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherSpringer
dc.publisher.placeGermany
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom715
dc.relation.ispartofpageto723
dc.relation.ispartofissue4
dc.relation.ispartofjournalEuropean Journal Applied Physiology
dc.relation.ispartofvolume111
dc.rights.retentionY
dc.subject.fieldofresearchBiomechanics
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchcode110601
dc.subject.fieldofresearchcode1106
dc.titleAge, muscle fatigue, and walking endurance in pre-menopausal women
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2011
gro.hasfulltextNo Full Text
gro.griffith.authorHills, Andrew


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