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Conference Paper/Proceeding/Abstract 1537 views

Normative data for lower limb peak mechanical power in children aged 7 to 11 years old

Nicholas Owen Orcid Logo

Journal of Comorbidity, Volume: 5, Issue: 5, Pages: 93 - 93

Swansea University Author: Nicholas Owen Orcid Logo

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DOI (Published version): 10.15256/joc.2015.5.52

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Aim: There are currently about 45 published instruments for the assessment of motor development in children. However, all of the tests lack robust evidence of reliability and validity. A high levels of lower limb peak muscular power (Pmp) is widely considered a key determinant of athletic performanc...

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Published in: Journal of Comorbidity
Published: Switzerland Swiss Medical Press 2015
Online Access: http://jcomorbidity.com/index.php/test/about
URI: https://cronfa.swan.ac.uk/Record/cronfa20870
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fullrecord <?xml version="1.0"?><rfc1807><datestamp>2016-11-22T07:05:26.2685764</datestamp><bib-version>v2</bib-version><id>20870</id><entry>2015-04-24</entry><title>Normative data for lower limb peak mechanical power in children aged 7 to 11 years old</title><swanseaauthors><author><sid>360b7822fd760c7d73a1b0ca5bce1c07</sid><ORCID>0000-0002-7067-8082</ORCID><firstname>Nicholas</firstname><surname>Owen</surname><name>Nicholas Owen</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2015-04-24</date><deptcode>STSC</deptcode><abstract>Aim: There are currently about 45 published instruments for the assessment of motor development in children. However, all of the tests lack robust evidence of reliability and validity. A high levels of lower limb peak muscular power (Pmp) is widely considered a key determinant of athletic performance; conversely it is reasonable to assume that poor physical performance, characterised by poor coordination, would be associated with low levels of Pmp. However there are currently limited valid data on normative values of Pmp in children. The aim of this study was to report valid normative data for Pmp in children.Method: Children 7 to 11 years old (n= 791, age 9.26 &#xB1; 1.20 decimal years, stature = 1.338 &#xB1; 0.094 m, body mass = 34.7 &#xB1; 9.7 kg) of mixed gender were randomly selected from schools in South Wales. Each child performed one countermovement jump (CMJ) off a force platform with their hand held on their hips to isolate the lower limbs. The ground reaction force was recorded and the momentum impulse principle was used to derive a criterion measure of lower limb peak instantaneous power (Pp).3 A pilot study had shown good reliability for Pp in children in this age range (ICC &amp;#62; 0.92). Participants were grouped in school years (Y) and comparisons were made between genders and year groups for Pp.Results: There was no significant difference in Pp between genders for year group (p = 0.05). Combined gender groups for each school year produced Pp that were normally distributed and had the following values (mean Pp, standard deviation), Y3 = 905 &#xB1; 191 W, Y4 = 1047 &#xB1; 233 W, Y5 = 1230 &#xB1; 258 W, Y6 = 1367 &#xB1; 326 W. A significant difference in Pp was found between successive mixed gender year groups (p= 0.01). Y3 (n= 190) to Y4 (n = 182), t = 6.01, p &amp;#60; 0.001, Y4 to Y5 (n = 215), t = 7.67, p &amp;#60; 0.001, Y5 to Y6 (n = 204), t = 3.94, p &amp;#60; 0.001.Discussion: This study indicates that Pp produced in a single-trial CMJ has the potential to provide information on the coordination of children aged 7 &#x2013; 11 years, with a high level of discrimination. For example, in Y3 (aged 7-8 years) there is a 12% increase in Pp between the 5th and 10th percentile. Pp as measured in a CMJ has the potential to augment tests like Movement Assessment Battery for Children-2. However more study is needed regarding the potential benefits of allometric scaling of Pp and further splitting school year groups into 3 month groups and comparison with other tests of physical ability.</abstract><type>Conference Paper/Proceeding/Abstract</type><journal>Journal of Comorbidity</journal><volume>5</volume><journalNumber>5</journalNumber><paginationStart>93</paginationStart><paginationEnd>93</paginationEnd><publisher>Swiss Medical Press</publisher><placeOfPublication>Switzerland</placeOfPublication><keywords>power; coordination; vertical jumping; children; force platform</keywords><publishedDay>2</publishedDay><publishedMonth>7</publishedMonth><publishedYear>2015</publishedYear><publishedDate>2015-07-02</publishedDate><doi>10.15256/joc.2015.5.52</doi><url>http://jcomorbidity.com/index.php/test/about</url><notes></notes><college>COLLEGE NANME</college><department>Sport and Exercise Sciences</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>STSC</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2016-11-22T07:05:26.2685764</lastEdited><Created>2015-04-24T16:34:01.0721588</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences</level></path><authors><author><firstname>Nicholas</firstname><surname>Owen</surname><orcid>0000-0002-7067-8082</orcid><order>1</order></author></authors><documents/><OutputDurs/></rfc1807>
spelling 2016-11-22T07:05:26.2685764 v2 20870 2015-04-24 Normative data for lower limb peak mechanical power in children aged 7 to 11 years old 360b7822fd760c7d73a1b0ca5bce1c07 0000-0002-7067-8082 Nicholas Owen Nicholas Owen true false 2015-04-24 STSC Aim: There are currently about 45 published instruments for the assessment of motor development in children. However, all of the tests lack robust evidence of reliability and validity. A high levels of lower limb peak muscular power (Pmp) is widely considered a key determinant of athletic performance; conversely it is reasonable to assume that poor physical performance, characterised by poor coordination, would be associated with low levels of Pmp. However there are currently limited valid data on normative values of Pmp in children. The aim of this study was to report valid normative data for Pmp in children.Method: Children 7 to 11 years old (n= 791, age 9.26 ± 1.20 decimal years, stature = 1.338 ± 0.094 m, body mass = 34.7 ± 9.7 kg) of mixed gender were randomly selected from schools in South Wales. Each child performed one countermovement jump (CMJ) off a force platform with their hand held on their hips to isolate the lower limbs. The ground reaction force was recorded and the momentum impulse principle was used to derive a criterion measure of lower limb peak instantaneous power (Pp).3 A pilot study had shown good reliability for Pp in children in this age range (ICC &#62; 0.92). Participants were grouped in school years (Y) and comparisons were made between genders and year groups for Pp.Results: There was no significant difference in Pp between genders for year group (p = 0.05). Combined gender groups for each school year produced Pp that were normally distributed and had the following values (mean Pp, standard deviation), Y3 = 905 ± 191 W, Y4 = 1047 ± 233 W, Y5 = 1230 ± 258 W, Y6 = 1367 ± 326 W. A significant difference in Pp was found between successive mixed gender year groups (p= 0.01). Y3 (n= 190) to Y4 (n = 182), t = 6.01, p &#60; 0.001, Y4 to Y5 (n = 215), t = 7.67, p &#60; 0.001, Y5 to Y6 (n = 204), t = 3.94, p &#60; 0.001.Discussion: This study indicates that Pp produced in a single-trial CMJ has the potential to provide information on the coordination of children aged 7 – 11 years, with a high level of discrimination. For example, in Y3 (aged 7-8 years) there is a 12% increase in Pp between the 5th and 10th percentile. Pp as measured in a CMJ has the potential to augment tests like Movement Assessment Battery for Children-2. However more study is needed regarding the potential benefits of allometric scaling of Pp and further splitting school year groups into 3 month groups and comparison with other tests of physical ability. Conference Paper/Proceeding/Abstract Journal of Comorbidity 5 5 93 93 Swiss Medical Press Switzerland power; coordination; vertical jumping; children; force platform 2 7 2015 2015-07-02 10.15256/joc.2015.5.52 http://jcomorbidity.com/index.php/test/about COLLEGE NANME Sport and Exercise Sciences COLLEGE CODE STSC Swansea University 2016-11-22T07:05:26.2685764 2015-04-24T16:34:01.0721588 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences Nicholas Owen 0000-0002-7067-8082 1
title Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
spellingShingle Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
Nicholas Owen
title_short Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
title_full Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
title_fullStr Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
title_full_unstemmed Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
title_sort Normative data for lower limb peak mechanical power in children aged 7 to 11 years old
author_id_str_mv 360b7822fd760c7d73a1b0ca5bce1c07
author_id_fullname_str_mv 360b7822fd760c7d73a1b0ca5bce1c07_***_Nicholas Owen
author Nicholas Owen
author2 Nicholas Owen
format Conference Paper/Proceeding/Abstract
container_title Journal of Comorbidity
container_volume 5
container_issue 5
container_start_page 93
publishDate 2015
institution Swansea University
doi_str_mv 10.15256/joc.2015.5.52
publisher Swiss Medical Press
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences
url http://jcomorbidity.com/index.php/test/about
document_store_str 0
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description Aim: There are currently about 45 published instruments for the assessment of motor development in children. However, all of the tests lack robust evidence of reliability and validity. A high levels of lower limb peak muscular power (Pmp) is widely considered a key determinant of athletic performance; conversely it is reasonable to assume that poor physical performance, characterised by poor coordination, would be associated with low levels of Pmp. However there are currently limited valid data on normative values of Pmp in children. The aim of this study was to report valid normative data for Pmp in children.Method: Children 7 to 11 years old (n= 791, age 9.26 ± 1.20 decimal years, stature = 1.338 ± 0.094 m, body mass = 34.7 ± 9.7 kg) of mixed gender were randomly selected from schools in South Wales. Each child performed one countermovement jump (CMJ) off a force platform with their hand held on their hips to isolate the lower limbs. The ground reaction force was recorded and the momentum impulse principle was used to derive a criterion measure of lower limb peak instantaneous power (Pp).3 A pilot study had shown good reliability for Pp in children in this age range (ICC &#62; 0.92). Participants were grouped in school years (Y) and comparisons were made between genders and year groups for Pp.Results: There was no significant difference in Pp between genders for year group (p = 0.05). Combined gender groups for each school year produced Pp that were normally distributed and had the following values (mean Pp, standard deviation), Y3 = 905 ± 191 W, Y4 = 1047 ± 233 W, Y5 = 1230 ± 258 W, Y6 = 1367 ± 326 W. A significant difference in Pp was found between successive mixed gender year groups (p= 0.01). Y3 (n= 190) to Y4 (n = 182), t = 6.01, p &#60; 0.001, Y4 to Y5 (n = 215), t = 7.67, p &#60; 0.001, Y5 to Y6 (n = 204), t = 3.94, p &#60; 0.001.Discussion: This study indicates that Pp produced in a single-trial CMJ has the potential to provide information on the coordination of children aged 7 – 11 years, with a high level of discrimination. For example, in Y3 (aged 7-8 years) there is a 12% increase in Pp between the 5th and 10th percentile. Pp as measured in a CMJ has the potential to augment tests like Movement Assessment Battery for Children-2. However more study is needed regarding the potential benefits of allometric scaling of Pp and further splitting school year groups into 3 month groups and comparison with other tests of physical ability.
published_date 2015-07-02T03:24:42Z
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