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Article: Trunk muscle endurance tests: Effect of trunk posture on test outcome

TitleTrunk muscle endurance tests: Effect of trunk posture on test outcome
Authors
Issue Date2010
PublisherNational Strength and Conditioning Association. The Journal's web site is located at http://www.nsca-lift.org/Publications/#JSCR
Citation
Journal Of Strength And Conditioning Research, 2010, v. 24 n. 12, p. 3464-3470 How to Cite?
AbstractThe objective of this study was to investigate the effect of different trunk postures during the abdominal flexor test on isometric endurance holding times and surface electromyographic (EMG) activity of contributing trunk flexor and extensor muscles in 16 healthy college-age male rowers (age, 22.0 ± 1.55 years; height, 179.1 ± 5.47 cm; weight, 68.0 ± 4.18 kg) with a minimum of 12 months rowing experience. Subjects performed 2 maximal effort abdominal flexor tests, 1 held with correct posture and the other with a slightly flexed incorrect trunk posture. Maximum holding time was assessed for each posture while EMG muscle activity was recorded for the external oblique, rectus abdominis, internal oblique, rectus femoris, and lumbar erector spinae muscles. Mean maximal holding time for the incorrectly positioned abdominal flexor test was significantly longer than for the correct position (p > 0.05). EMG activity during the first and last 20% of a time normalized comparison showed significantly lower muscle activity during the incorrect trunk posture in all muscles investigated (p > 0.05). There were no significant differences (p > 0.05) in muscle activity when comparing an equivalent time period at the actual termination of each of the 2 abdominal flexor tests. Although minor variations in trunk posture seem to be acceptable in practice of this isometric abdominal flexor test, the present data indicate that minor lumbar kyphosis deviating away from the correct abdominal flexor test posture can significantly skew test reliability, resulting in longer endurance holding times and relatively lower muscle activity of the trunk muscles. © 2010 National Strength and Conditioning Association.
Persistent Identifierhttp://hdl.handle.net/10722/176072
ISSN
2015 Impact Factor: 1.978
2015 SCImago Journal Rankings: 1.228
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTse, MAen_US
dc.contributor.authorMcmanus, AMen_US
dc.contributor.authorMasters, RSen_US
dc.date.accessioned2012-11-26T09:04:51Z-
dc.date.available2012-11-26T09:04:51Z-
dc.date.issued2010en_US
dc.identifier.citationJournal Of Strength And Conditioning Research, 2010, v. 24 n. 12, p. 3464-3470en_US
dc.identifier.issn1064-8011en_US
dc.identifier.urihttp://hdl.handle.net/10722/176072-
dc.description.abstractThe objective of this study was to investigate the effect of different trunk postures during the abdominal flexor test on isometric endurance holding times and surface electromyographic (EMG) activity of contributing trunk flexor and extensor muscles in 16 healthy college-age male rowers (age, 22.0 ± 1.55 years; height, 179.1 ± 5.47 cm; weight, 68.0 ± 4.18 kg) with a minimum of 12 months rowing experience. Subjects performed 2 maximal effort abdominal flexor tests, 1 held with correct posture and the other with a slightly flexed incorrect trunk posture. Maximum holding time was assessed for each posture while EMG muscle activity was recorded for the external oblique, rectus abdominis, internal oblique, rectus femoris, and lumbar erector spinae muscles. Mean maximal holding time for the incorrectly positioned abdominal flexor test was significantly longer than for the correct position (p > 0.05). EMG activity during the first and last 20% of a time normalized comparison showed significantly lower muscle activity during the incorrect trunk posture in all muscles investigated (p > 0.05). There were no significant differences (p > 0.05) in muscle activity when comparing an equivalent time period at the actual termination of each of the 2 abdominal flexor tests. Although minor variations in trunk posture seem to be acceptable in practice of this isometric abdominal flexor test, the present data indicate that minor lumbar kyphosis deviating away from the correct abdominal flexor test posture can significantly skew test reliability, resulting in longer endurance holding times and relatively lower muscle activity of the trunk muscles. © 2010 National Strength and Conditioning Association.en_US
dc.languageengen_US
dc.publisherNational Strength and Conditioning Association. The Journal's web site is located at http://www.nsca-lift.org/Publications/#JSCRen_US
dc.relation.ispartofJournal of Strength and Conditioning Researchen_US
dc.subject.meshAnalysis Of Varianceen_US
dc.subject.meshElectromyographyen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshMuscle, Skeletal - Physiologyen_US
dc.subject.meshPhysical Endurance - Physiologyen_US
dc.subject.meshPosture - Physiologyen_US
dc.subject.meshSports - Physiologyen_US
dc.subject.meshThorax - Physiologyen_US
dc.subject.meshYoung Adulten_US
dc.titleTrunk muscle endurance tests: Effect of trunk posture on test outcomeen_US
dc.typeArticleen_US
dc.identifier.emailMcmanus, AM: alimac@hku.hken_US
dc.identifier.emailMasters, RS: mastersr@hku.hken_US
dc.identifier.authorityMcmanus, AM=rp00936en_US
dc.identifier.authorityMasters, RS=rp00935en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1519/JSC.0b013e3181aeb195en_US
dc.identifier.pmid19996789-
dc.identifier.scopuseid_2-s2.0-79953022900en_US
dc.identifier.hkuros184790-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79953022900&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume24en_US
dc.identifier.issue12en_US
dc.identifier.spage3464en_US
dc.identifier.epage3470en_US
dc.identifier.isiWOS:000284404200035-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridTse, MA=8966350200en_US
dc.identifier.scopusauthoridMcmanus, AM=7004635919en_US
dc.identifier.scopusauthoridMasters, RS=7102880488en_US

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