dc.contributor.author |
Dotan, R |
en |
dc.contributor.author |
Mitchell, Cameron |
en |
dc.contributor.author |
Cohen, R |
en |
dc.contributor.author |
Gabriel, D |
en |
dc.contributor.author |
Klentrou, P |
en |
dc.contributor.author |
Falk, B |
en |
dc.date.accessioned |
2015-12-18T01:15:38Z |
en |
dc.date.issued |
2013-01-15 |
en |
dc.identifier.citation |
Journal of Sports Sciences, 2013, 31 (9), pp. 945 - 953 |
en |
dc.identifier.issn |
1466-447X |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/27823 |
en |
dc.description.abstract |
Children have lower size-normalised maximal voluntary force, speed, and power than adults. It has been hypothesised that these and other age-related performance differences are due to lesser type-II motor-unit utilisation in children. This should be manifested as slower force kinetics in explosive muscle contractions. The purpose of this study was to investigate the nature of child-adult force-kinetics differences and whether the latter could support that hypothesis. Untrained boys (n = 20) and men (n = 20) (10.1 ± 1.3 and 22.9 ± 4.4 years, respectively), performed maximal, explosive, isometric elbow flexions and knee extensions on a Biodex dynamometer. Peak torque (MVC), times to 10-100% MVC, and other kinetics parameters were determined. The boys' body-mass-normalised knee extension MVC, peak rate of torque development, and %MVC at 100 ms were 26, 17 and 23% lower compared with the men and their times to 30% and 80% MVC were 24 and 48% longer, respectively. Elbow flexion kinetics showed similar or greater differences. The findings illuminate boys' inherent disadvantage in tasks requiring speed or explosive force. It is demonstrated that the extent of the boys-men kinetics disparity cannot be explained by muscle-composition and/or musculo-tendinous-stiffness differences. We suggest therefore that the findings indirectly support children's lower utilisation of type-II motor units. |
en |
dc.format.medium |
Print-Electronic |
en |
dc.language |
eng |
en |
dc.publisher |
Taylor & Francis: SSH Journals |
en |
dc.relation.ispartofseries |
Journal of Sports Sciences |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.subject |
Knee |
en |
dc.subject |
Elbow |
en |
dc.subject |
Muscle, Skeletal |
en |
dc.subject |
Humans |
en |
dc.subject |
Electromyography |
en |
dc.subject |
Age Factors |
en |
dc.subject |
Muscle Contraction |
en |
dc.subject |
Kinetics |
en |
dc.subject |
Torque |
en |
dc.subject |
Adolescent |
en |
dc.subject |
Adult |
en |
dc.subject |
Child |
en |
dc.subject |
Male |
en |
dc.subject |
Muscle Strength |
en |
dc.subject |
Muscle Strength Dynamometer |
en |
dc.subject |
Young Adult |
en |
dc.title |
Child-adult differences in the kinetics of torque development |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1080/02640414.2012.757343 |
en |
pubs.issue |
9 |
en |
pubs.begin-page |
945 |
en |
pubs.volume |
31 |
en |
dc.rights.holder |
Copyright:
Taylor & Francis: SSH Journals |
en |
dc.identifier.pmid |
23320937 |
en |
pubs.end-page |
953 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
508570 |
en |
dc.identifier.eissn |
1466-447X |
en |
pubs.record-created-at-source-date |
2015-12-18 |
en |
pubs.dimensions-id |
23320937 |
en |