Changes in anthropometry and performance, and their inter-relationships, across three seasons in elite youth rugby league players

Hdl Handle:
http://hdl.handle.net/10034/326266
Title:
Changes in anthropometry and performance, and their inter-relationships, across three seasons in elite youth rugby league players
Authors:
Waldron, Mark; Worsfold, Paul R.; Twist, Craig; Lamb, Kevin L.
Abstract:
This study investigated changes in anthropometry and performance, and their inter-relationships, across three consecutive seasons (under-15 to under-17 age group) in elite youth rugby league players. Each player took part in annual anthropometrical and performance assessments, comprising measurements of stature; body mass; limb lengths and circumference; skinfolds, predicted muscle cross-sectional area (CSA); 20 m speed, counter-movement jump height, vertical power and aerobic power. Lean body mass % changed (P < 0.05) between the under-15 (70.9 ± 5.9 %), under-16 (72.0 ± 5.8 %) and the under-17 age groups (74.1 ± 5.7 %). Likewise, predicted quadriceps muscle cross-sectional area (CSA) also changed (P < 0.05) between each age group (under-15 = 120.9 ± 37.8 cm2; under-16 = 133.2 ± 36.0 cm2; under-17 = 154.8 ± 28.3 cm2). Concomitant changes between the under-15 and under-16 group were found for 20 m speed (3.5 ± 0.1 cf. 3.4 ± 0.2 s; P = 0.008) and predicted jumping power (3611.3 ± 327.3 W cf. 4081.5 ± 453.9 W; P = 0.003). Both lean body mass and quadriceps muscle CSA consistently, related to both 20 m sprint time and jumping power, with r-values ranging between -0.39 to –0.63 (20 m sprint time) and 0.55 to 0.75 (jumping power). Our findings demonstrate the importance of gains in lean body mass across later-adolescence that support the ability to generate horizontal speed and predicted vertical power. This information should inform the expectations and subsequent training programs of elite rugby league practitioners.
Affiliation:
University of New England, Australia ; University of Chester ; University of Chester ; University of Chester
Citation:
Journal of Strength and Conditioning Research, 2014, 28(11), pp. 3128-3136.
Publisher:
Lippincott, Williams & Wilkins
Journal:
Journal of Strength and Conditioning Research
Publication Date:
Nov-2014
URI:
http://hdl.handle.net/10034/326266
DOI:
10.1519/JSC.0000000000000445
Additional Links:
http://journals.lww.com/nsca-jscr/pages/default.aspx
Type:
Article
Language:
en
Description:
This is a non-final version of an article published in final form in Journal of Strength and Conditioning Research, 2014, 28(11), pp. 3128-3136.
ISSN:
1064-8011
EISSN:
1533-4287
Appears in Collections:
Sport and Exercise Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorWaldron, Marken
dc.contributor.authorWorsfold, Paul R.en
dc.contributor.authorTwist, Craigen
dc.contributor.authorLamb, Kevin L.en
dc.date.accessioned2014-09-19T10:51:51Zen
dc.date.available2014-09-19T10:51:51Zen
dc.date.issued2014-11en
dc.identifier.citationJournal of Strength and Conditioning Research, 2014, 28(11), pp. 3128-3136.en
dc.identifier.issn1064-8011en
dc.identifier.doi10.1519/JSC.0000000000000445en
dc.identifier.urihttp://hdl.handle.net/10034/326266en
dc.descriptionThis is a non-final version of an article published in final form in Journal of Strength and Conditioning Research, 2014, 28(11), pp. 3128-3136.en
dc.description.abstractThis study investigated changes in anthropometry and performance, and their inter-relationships, across three consecutive seasons (under-15 to under-17 age group) in elite youth rugby league players. Each player took part in annual anthropometrical and performance assessments, comprising measurements of stature; body mass; limb lengths and circumference; skinfolds, predicted muscle cross-sectional area (CSA); 20 m speed, counter-movement jump height, vertical power and aerobic power. Lean body mass % changed (P < 0.05) between the under-15 (70.9 ± 5.9 %), under-16 (72.0 ± 5.8 %) and the under-17 age groups (74.1 ± 5.7 %). Likewise, predicted quadriceps muscle cross-sectional area (CSA) also changed (P < 0.05) between each age group (under-15 = 120.9 ± 37.8 cm2; under-16 = 133.2 ± 36.0 cm2; under-17 = 154.8 ± 28.3 cm2). Concomitant changes between the under-15 and under-16 group were found for 20 m speed (3.5 ± 0.1 cf. 3.4 ± 0.2 s; P = 0.008) and predicted jumping power (3611.3 ± 327.3 W cf. 4081.5 ± 453.9 W; P = 0.003). Both lean body mass and quadriceps muscle CSA consistently, related to both 20 m sprint time and jumping power, with r-values ranging between -0.39 to –0.63 (20 m sprint time) and 0.55 to 0.75 (jumping power). Our findings demonstrate the importance of gains in lean body mass across later-adolescence that support the ability to generate horizontal speed and predicted vertical power. This information should inform the expectations and subsequent training programs of elite rugby league practitioners.en
dc.language.isoenen
dc.publisherLippincott, Williams & Wilkinsen
dc.relation.urlhttp://journals.lww.com/nsca-jscr/pages/default.aspxen
dc.subjectteam sporten
dc.subjectspeeden
dc.subjectpoweren
dc.titleChanges in anthropometry and performance, and their inter-relationships, across three seasons in elite youth rugby league playersen
dc.typeArticleen
dc.identifier.eissn1533-4287en
dc.contributor.departmentUniversity of New England, Australia ; University of Chester ; University of Chester ; University of Chesteren
dc.identifier.journalJournal of Strength and Conditioning Researchen
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