2.50
Hdl Handle:
http://hdl.handle.net/2436/118848
Title:
Evaluation of knee peak torque in athletic and sedentary children.
Authors:
Deighan, Martine A.; Nevill, Alan M.; Maffulli, Nicola; Cheng, Jack C. Y.; Gleeson, Nigel
Other Titles:
Atletik ve sedanter çocuklarda diz zirve torkunun değerlendirilmesi
Abstract:
Objectives: We examined the influence of sex, level of activity, and pubertal status on knee extension (Ext) and flexion(Fl) peak torque (PT) in children using an allometric modeling approach. Methods: A total of 140 students (67 males, 73 females)aged 12/13 years were enrolled from a Hong Kong junior high school, whose curricula were based on physical education (n=69) or arts (n=71). Isokinetic concentric Ext and Fl PT of the dominant leg was assessed at 1.04 rad/sec using a Cybex II+ dynamometer and body mass,stature, and pubertal stage were measured. A repeated-measures ANOVA test was performed on absolute PT data with muscle action (Ext and Fl) as a within-subject factor and between-subject factors including sex, group,and pubertal stage. To assess the effects on body sizeadjusted PT, linear ANCOVA and log-linear ANCOVA techniques were used with body mass and stature taken as covariates. Results: Peak torque was significantly greater in boys compared to girls, and in the physical education group compared to the arts group. When PT was adjusted for differences in body size, there was a greater difference in PT between girls in the two groups compared to boys, and there was a significant effect of pubertal stage. Allometric analysis showed that PT was influenced more by stature than body mass, and PT increased at a greater rate than body size (both p<0.01). Conclusion: There may be a need for a physical activity intervention in sedentary 12/13 year old girls. Peak torque appears to increase disproportionately to body size. This may result from a greater increase in leg muscle mass relative to body mass
Citation:
Acta orthopaedica et traumatologica turcica, 43 (6):484-90
Publisher:
Ekin Medical Publishing
Journal:
Acta orthopaedica et traumatologica turcica
Issue Date:
2009
URI:
http://hdl.handle.net/2436/118848
DOI:
10.3944/AOTT.2009.484
PubMed ID:
20134215
Type:
Article
Language:
en
Description:
Article also available in Turkish
ISSN:
1017-995X
Appears in Collections:
Learning and Teaching in Sport, Exercise and Performance

Full metadata record

DC FieldValue Language
dc.contributor.authorDeighan, Martine A.en
dc.contributor.authorNevill, Alan M.en
dc.contributor.authorMaffulli, Nicolaen
dc.contributor.authorCheng, Jack C. Y.en
dc.contributor.authorGleeson, Nigelen
dc.date.accessioned2011-01-06T14:50:26Z-
dc.date.available2011-01-06T14:50:26Z-
dc.date.issued2009-
dc.identifier.citationActa orthopaedica et traumatologica turcica, 43 (6):484-90en
dc.identifier.issn1017-995X-
dc.identifier.pmid20134215-
dc.identifier.doi10.3944/AOTT.2009.484-
dc.identifier.urihttp://hdl.handle.net/2436/118848-
dc.descriptionArticle also available in Turkishen
dc.description.abstractObjectives: We examined the influence of sex, level of activity, and pubertal status on knee extension (Ext) and flexion(Fl) peak torque (PT) in children using an allometric modeling approach. Methods: A total of 140 students (67 males, 73 females)aged 12/13 years were enrolled from a Hong Kong junior high school, whose curricula were based on physical education (n=69) or arts (n=71). Isokinetic concentric Ext and Fl PT of the dominant leg was assessed at 1.04 rad/sec using a Cybex II+ dynamometer and body mass,stature, and pubertal stage were measured. A repeated-measures ANOVA test was performed on absolute PT data with muscle action (Ext and Fl) as a within-subject factor and between-subject factors including sex, group,and pubertal stage. To assess the effects on body sizeadjusted PT, linear ANCOVA and log-linear ANCOVA techniques were used with body mass and stature taken as covariates. Results: Peak torque was significantly greater in boys compared to girls, and in the physical education group compared to the arts group. When PT was adjusted for differences in body size, there was a greater difference in PT between girls in the two groups compared to boys, and there was a significant effect of pubertal stage. Allometric analysis showed that PT was influenced more by stature than body mass, and PT increased at a greater rate than body size (both p<0.01). Conclusion: There may be a need for a physical activity intervention in sedentary 12/13 year old girls. Peak torque appears to increase disproportionately to body size. This may result from a greater increase in leg muscle mass relative to body massen
dc.languagetur-
dc.language.isoenen
dc.publisherEkin Medical Publishingen
dc.subjectAdolescenten
dc.subjectAnthropometryen
dc.subjectBody heighten
dc.subjectBody weighten
dc.subjectChild developmenten
dc.subjectExerciseen
dc.subjectIsometric contractionen
dc.subjectKneeen
dc.subjectMuscle development;en
dc.subjectPubertyen
dc.subjectSex factorsen
dc.subjectTorqueen
dc.subject.meshAdolescenten
dc.subject.meshAthletesen
dc.subject.meshBody Heighten
dc.subject.meshBody Sizeen
dc.subject.meshChilden
dc.subject.meshFemaleen
dc.subject.meshFunctional Lateralityen
dc.subject.meshHumansen
dc.subject.meshKnee Jointen
dc.subject.meshMaleen
dc.subject.meshMultivariate Analysisen
dc.subject.meshRange of Motion, Articularen
dc.subject.meshSedentary Lifestyleen
dc.subject.meshTorqueen
dc.titleEvaluation of knee peak torque in athletic and sedentary children.en
dc.title.alternativeAtletik ve sedanter çocuklarda diz zirve torkunun değerlendirilmesien
dc.typeArticleen
dc.identifier.journalActa orthopaedica et traumatologica turcicaen

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