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Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years / Christopher M. Jones

DOI (Published version): 10.23889/Suthesis.49018

Abstract

Measuring countermovement jump (CMJ) variables such as instantaneous peak mechanical power output (PPO) in children has been shown to be associated with a wide variety of factors such as measuring bone health and identifying children at risk of motor disorders. Yet, how PPO and other variables are a...

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Published: 2018
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa49018
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first_indexed 2019-02-28T14:06:25Z
last_indexed 2019-10-21T16:54:11Z
id cronfa49018
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spelling 2019-03-01T13:42:58.7992155 v2 49018 2019-02-28 Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years 2019-02-28 Measuring countermovement jump (CMJ) variables such as instantaneous peak mechanical power output (PPO) in children has been shown to be associated with a wide variety of factors such as measuring bone health and identifying children at risk of motor disorders. Yet, how PPO and other variables are attained lack validity as no criterion method or methods of estimating CMJ variables have been developed for children (aged 7 to 11 years). Therefore, the aim of this thesis was to develop a criterion method for assessing PPO in children. This thesis also sought to develop prediction equations for estimating PPO. Experimental Chapter 1 found absolute differences in unprocessed CMJ variables between elite adults and children highlighting that a new criterion method was needed for children. Experimental Chapter 2 established that CMJ variables that do not account for body size need to represent children by 2 groups, whereas, if body size is accounted then children can be represented as one homogenous group. The findings of this chapter demonstrated that that more than one criterion method was needed to be developed for children. Experimental Chapter 3 developed two criterion methods for assessing PPO from a CMJ for children, reporting a less stringent specification for the children criterion methods when compared to the elite adult criterion method specifications. Having achieved the first part of the thesis aim Experimental Chapter 4 developed a number of regression equations to estimate PPO in children to enable practitioners who do not have access to force platforms to have a means of estimating PPO by easily measured variables in the field such as body mass and flight height. In conclusion, this thesis has made significant steps in providing a standardised method of measuring or estimating PPO and other CMJ variables in children aged 7 to 11 years for future researchers. E-Thesis 31 12 2018 2018-12-31 10.23889/Suthesis.49018 COLLEGE NANME COLLEGE CODE Swansea University Doctoral Ph.D 2019-03-01T13:42:58.7992155 2019-02-28T12:14:21.8050343 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Christopher M. Jones 1 49018__16348__bc661895ac494320afe6d00963555964.pdf Jones_Christopher_M_ PhD_Thesis_Final.pdf 2020-01-17T12:12:11.2386680 Output 3086728 application/pdf E-Thesis – open access true true eng
title Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
spellingShingle Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
,
title_short Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
title_full Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
title_fullStr Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
title_full_unstemmed Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
title_sort Developing a Criterion Method for Assessing Countermovement Jump Variables in Children Aged 7 to 11 Years
author ,
author2 Christopher M. Jones
format E-Thesis
publishDate 2018
institution Swansea University
doi_str_mv 10.23889/Suthesis.49018
college_str Faculty of Science and Engineering
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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 Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Measuring countermovement jump (CMJ) variables such as instantaneous peak mechanical power output (PPO) in children has been shown to be associated with a wide variety of factors such as measuring bone health and identifying children at risk of motor disorders. Yet, how PPO and other variables are attained lack validity as no criterion method or methods of estimating CMJ variables have been developed for children (aged 7 to 11 years). Therefore, the aim of this thesis was to develop a criterion method for assessing PPO in children. This thesis also sought to develop prediction equations for estimating PPO. Experimental Chapter 1 found absolute differences in unprocessed CMJ variables between elite adults and children highlighting that a new criterion method was needed for children. Experimental Chapter 2 established that CMJ variables that do not account for body size need to represent children by 2 groups, whereas, if body size is accounted then children can be represented as one homogenous group. The findings of this chapter demonstrated that that more than one criterion method was needed to be developed for children. Experimental Chapter 3 developed two criterion methods for assessing PPO from a CMJ for children, reporting a less stringent specification for the children criterion methods when compared to the elite adult criterion method specifications. Having achieved the first part of the thesis aim Experimental Chapter 4 developed a number of regression equations to estimate PPO in children to enable practitioners who do not have access to force platforms to have a means of estimating PPO by easily measured variables in the field such as body mass and flight height. In conclusion, this thesis has made significant steps in providing a standardised method of measuring or estimating PPO and other CMJ variables in children aged 7 to 11 years for future researchers.
published_date 2018-12-31T03:59:45Z
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score 11.016258

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