2.50
Hdl Handle:
http://hdl.handle.net/2436/22613
Title:
Enhancing specificity in proxy-design for the assessment of bioenergetics.
Authors:
Flouris, Andreas D.; Koutedakis, Yiannis; Nevill, Alan M.; Metsios, Giorgos S.; Tsiotra, Georgia D.; Tsiotra, Georgia D.; Parasiris, Y.
Abstract:
The purpose of this study was to examine the hypothesis that improved prediction of bioenergetics may be achieved when proxies are designed to simulate closely gold standard laboratory protocols. To accomplish this, a modified 'square' variation (SST) of the classical 20m Multistage Shuttle Run Test (MST) was designed aiming to reduce the stopping, turning and side-stepping manoeuvres. Within two weeks, 50 male volunteers (age 21.5+/-1.6, BMI 24.4+/-2.2) randomly underwent three maximal oxygen uptake (VO2max) assessments using a treadmill test (TT), the SST and MST. To assess SST reproducibility, 10 randomly-selected subjects performed the test twice. Validity results showed that mean predicted VO2max from SST was not significantly different compared to TT VO2max (p>0.05). In contrast, the equivalent value from MST was significantly higher (p<0.001) than TT. Furthermore, TT VO2max correlated with SST and MST at r=0.88 (p<0.001) and r=0.61 (p<0.05), respectively. The '95% limits of agreement' analysis (LIM(AG)) for SST and MST indicated a range of error equal to -0.5+/-5.4 and 8.1+/-8.0 (ml.kg(-1).min(-1)) with a coefficient of variation of +/-6 and +/-8.2%, respectively. Test-retest results for SST revealed no mean difference in VO2max (p>0.05) and a correlation coefficient of r=0.98 (p<0.001), while LIM(AG) demonstrated a range of error equal to -0.2+/-2.6 (ml.kg(-1).min(-1)) with a coefficient of variation of +/-5.6%. It is concluded that, compared to MST, the SST had a higher agreement with TT. The latter may well be explained by the closer simulation in bioenergetics between the two protocols (ie, the continuous nature of SST provides a closer proxy of TT).
Citation:
Journal of Science and Medicine in Sport, 7 (2): 197-204
Publisher:
Elsevier Science Direct
Journal:
Journal of Science and Medicine in Sport
Issue Date:
2004
URI:
http://hdl.handle.net/2436/22613
DOI:
10.1016/S1440-2440(04)80009-4
PubMed ID:
15362315
Additional Links:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B82X6-4HTKDS5-9&_user=1644469&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000054077&_version=1&_urlVersion=0&_userid=1644469&md5=d2592481f318850a9e2dd8cc38170f9f
Type:
Article
Language:
en
ISSN:
1440-2440
Appears in Collections:
Sport, Exercise and Health Research Group; Exercise and Health; Learning and Teaching in Sport, Exercise and Performance

Full metadata record

DC FieldValue Language
dc.contributor.authorFlouris, Andreas D.-
dc.contributor.authorKoutedakis, Yiannis-
dc.contributor.authorNevill, Alan M.-
dc.contributor.authorMetsios, Giorgos S.-
dc.contributor.authorTsiotra, Georgia D.-
dc.contributor.authorTsiotra, Georgia D.-
dc.contributor.authorParasiris, Y.-
dc.date.accessioned2008-04-08T14:37:13Z-
dc.date.available2008-04-08T14:37:13Z-
dc.date.issued2004-
dc.identifier.citationJournal of Science and Medicine in Sport, 7 (2): 197-204en
dc.identifier.issn1440-2440-
dc.identifier.pmid15362315-
dc.identifier.doi10.1016/S1440-2440(04)80009-4-
dc.identifier.urihttp://hdl.handle.net/2436/22613-
dc.description.abstractThe purpose of this study was to examine the hypothesis that improved prediction of bioenergetics may be achieved when proxies are designed to simulate closely gold standard laboratory protocols. To accomplish this, a modified 'square' variation (SST) of the classical 20m Multistage Shuttle Run Test (MST) was designed aiming to reduce the stopping, turning and side-stepping manoeuvres. Within two weeks, 50 male volunteers (age 21.5+/-1.6, BMI 24.4+/-2.2) randomly underwent three maximal oxygen uptake (VO2max) assessments using a treadmill test (TT), the SST and MST. To assess SST reproducibility, 10 randomly-selected subjects performed the test twice. Validity results showed that mean predicted VO2max from SST was not significantly different compared to TT VO2max (p>0.05). In contrast, the equivalent value from MST was significantly higher (p<0.001) than TT. Furthermore, TT VO2max correlated with SST and MST at r=0.88 (p<0.001) and r=0.61 (p<0.05), respectively. The '95% limits of agreement' analysis (LIM(AG)) for SST and MST indicated a range of error equal to -0.5+/-5.4 and 8.1+/-8.0 (ml.kg(-1).min(-1)) with a coefficient of variation of +/-6 and +/-8.2%, respectively. Test-retest results for SST revealed no mean difference in VO2max (p>0.05) and a correlation coefficient of r=0.98 (p<0.001), while LIM(AG) demonstrated a range of error equal to -0.2+/-2.6 (ml.kg(-1).min(-1)) with a coefficient of variation of +/-5.6%. It is concluded that, compared to MST, the SST had a higher agreement with TT. The latter may well be explained by the closer simulation in bioenergetics between the two protocols (ie, the continuous nature of SST provides a closer proxy of TT).en
dc.language.isoenen
dc.publisherElsevier Science Directen
dc.relation.urlhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B82X6-4HTKDS5-9&_user=1644469&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000054077&_version=1&_urlVersion=0&_userid=1644469&md5=d2592481f318850a9e2dd8cc38170f9fen
dc.subject.meshAdulten
dc.subject.meshEnergy Metabolismen
dc.subject.meshExercise Testen
dc.subject.meshHumansen
dc.subject.meshMaleen
dc.subject.meshOxygen Consumptionen
dc.subject.meshReference Valuesen
dc.subject.meshRegression Analysisen
dc.subject.meshReproducibility of Resultsen
dc.subject.meshRunningen
dc.subject.meshSensitivity and Specificityen
dc.subject.meshSports Medicineen
dc.titleEnhancing specificity in proxy-design for the assessment of bioenergetics.en
dc.typeArticleen
dc.identifier.journalJournal of Science and Medicine in Sporten

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