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dc.contributor.authorBartlett, Jonathan D
dc.contributor.authorHatfield, Malcolm
dc.contributor.authorParker, Ben B
dc.contributor.authorRoberts, Llion A
dc.contributor.authorMinahan, Clare
dc.contributor.authorMorton, James P
dc.contributor.authorThornton, Heidi R
dc.date.accessioned2019-10-02T22:55:12Z
dc.date.available2019-10-02T22:55:12Z
dc.date.issued2019
dc.identifier.issn1746-1391
dc.identifier.doi10.1080/17461391.2019.1669718
dc.identifier.urihttp://hdl.handle.net/10072/387995
dc.description.abstractThis study examined the relationship between dual-energy x-ray absorptiometry (DXA)-derived estimates of energy balance (EB) and changes in body composition across various seasonal phases in team sport athletes. Forty-five Australian rules footballers underwent six DXA scans across a 12-month period (off-season [OS, Week 0–13], early [PS1, Week 13–22] and late pre-season [PS2, Week 22–31] and early [IS1, Week 3–42] and late in-season [IS2, Week 42–51]). EB (kcal·day−1) was estimated from changes in fat free soft tissue mass (FFSTM) and fat mass (FM) between scans according to a validated formula. An EB threshold of ± 123 kcal·day−1 for >60 days demonstrated a very likely (>95% probability) change in FFSTM (>1.0 kg) and FM (>0.7 kg). There were small to almost perfect relationships between EB and changes in FM (r = 0.97, 95% CI, 0.96–0.98), FFSTM (r = −0.41, −0.92 to −0.52) and body mass (r = 0.27, 0.14–0.40). EB was lowest during PS1 compared to all other phases (range, −265 to −142 kcal·day−1), with no other changes at any time. Increases in FFSTM were higher during OS compared to PS2 (1.6 ± 0.4 kg), and higher during PS1 compared to PS2, IS1, and IS2 (range, 1.6–2.1 kg). There were no changes during in-season (−0.1–0.05 kg). FM decreased only in PS1 compared to all other seasonal phases (−1.8 to −1.0 kg). Assessments of body composition can be used as a tool to estimate EB, which practically can be used to indicate athlete’s training and nutrition behaviours/practices.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherTaylor & Francis
dc.publisher.placeUnited Kingdom
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto9
dc.relation.ispartofjournalEuropean Journal of Sport Science
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchMechanical Engineering
dc.subject.fieldofresearchcode1106
dc.subject.fieldofresearchcode0913
dc.subject.keywordsAFL
dc.subject.keywordseducation
dc.subject.keywordsnutrition
dc.subject.keywordsperiodization
dc.subject.keywordstraining
dc.titleDXA-derived estimates of energy balance and its relationship with changes in body composition across a season in team sport athletes.
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationBartlett, JD; Hatfield, M; Parker, BB; Roberts, LA; Minahan, C; Morton, JP; Thornton, HR, DXA-derived estimates of energy balance and its relationship with changes in body composition across a season in team sport athletes., European Journal of Sport Science, 2019, pp. 1-9
dc.date.updated2019-10-01T23:49:11Z
dc.description.versionPost-print
gro.description.notepublicThis publication has been entered into Griffith Research Online as an Advanced Online Version.
gro.rights.copyright© 2019 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in European Journal of Sport Science on 29 Sep 2019, available online: https://doi.org/10.1080/17461391.2019.1669718
gro.hasfulltextFull Text
gro.griffith.authorRoberts, Llion A.
gro.griffith.authorMinahan, Clare L.


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