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dc.contributor.authorDoering, Thomas M
dc.contributor.authorCox, Gregory R
dc.contributor.authorAreta, Jose L
dc.contributor.authorCoffey, Vernon G
dc.date.accessioned2019-07-08T01:29:14Z
dc.date.available2019-07-08T01:29:14Z
dc.date.issued2019
dc.identifier.issn1440-2440
dc.identifier.doi10.1016/j.jsams.2019.03.009
dc.identifier.urihttp://hdl.handle.net/10072/386224
dc.description.abstractObjectives: To determine if a 4 d period of high carbohydrate intake can supercompensate muscle glycogen and exercise work capacity on back-to-back occasions. Design: Seven trained cyclists (6 male, VO2peak: 57 ± 4 mL kg−1 min−1) completed a 9-d experimental period, consisting of three intermittent exhaustive cycling trials on days 1 (trial 1), 5 (trial 2) and 9 (trial 3). Following trial 1 cyclists were fed a high carbohydrate diet (˜10 g kg−1 day−1) for eight days to assess their capacity to repeatedly supercompensate muscle glycogen with 4 d recovery. Methods: A resting muscle biopsy was obtained prior to each trial consisting of 2 min work intervals (90–60% peak power output) interspersed with 2 min recovery (40% peak power output) repeated until exhaustion. Each 72-h period between trial days included two days of low volume cycling and a rest day. Resting muscle glycogen and total work completed was determined for each trial day. Results: Baseline muscle glycogen on day 1 (583.6 ± 111.0 mmol kg−1 dry mass) was supercompensated on day 5 (835.1 ± 112.8 mmol kg−1 dry mass; p = 0.04, d = 2.25) and again on day 9 (848.3 ± 111.4 mmol kg−1 dry mass; p = 0.01, d = 2.38). Total cycling work capacity increased from trial 1 to trial 2 (+8.7 ± 5.4 kJ kg−1; p = 0.01; d = 1.41); a large effect was observed in trial 3 compared to trial 1 (+6.4 ± 6.8 kJ kg−1; p = 0.10; d = 1.10). Conclusions: A 4 d high carbohydrate feeding strategy is sufficient to repeatedly supercompensate muscle glycogen content following exhaustive exercise and results in enhanced work capacity.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom907
dc.relation.ispartofpageto911
dc.relation.ispartofissue8
dc.relation.ispartofjournalJournal of Science and Medicine in Sport
dc.relation.ispartofvolume22
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchMedical Physiology
dc.subject.fieldofresearchPublic Health and Health Services
dc.subject.fieldofresearchcode1106
dc.subject.fieldofresearchcode1116
dc.subject.fieldofresearchcode1117
dc.titleRepeated muscle glycogen supercompensation with four days’ recovery between exhaustive exercise
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2019 Sports Medicine Australia. Published by Elsevier Ltd. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorDoering, Thomas M.


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