Evaluating the effects of caffeine and sodium bicarbonate, ingested individually or in combination, and a taste-matched placebo on high-intensity cycling capacity in healthy males

Hdl Handle:
http://hdl.handle.net/10545/621154
Title:
Evaluating the effects of caffeine and sodium bicarbonate, ingested individually or in combination, and a taste-matched placebo on high-intensity cycling capacity in healthy males
Authors:
Higgins, Matthew F.; Wilson, Susie; Hill, Cameron; Price, Michael J.; Duncan, Michael J. ( 0000-0002-2016-6580 ) ; Tallis, Jason
Other Titles:
Physiologie appliquee, nutrition et metabolisme
Abstract:
This study evaluated the effects of ingesting sodium bicarbonate (NaHCO3) or caffeine individually or in combination on high-intensity cycling capacity. In a counterbalanced, crossover design, 13 healthy, noncycling trained males (age: 21 ± 3 years, height: 178 ± 6 cm, body mass: 76 ± 12 kg, peak power output (Wpeak): 230 ± 34 W, peak oxygen uptake: 46 ± 8 mL·kg(-1)·min(-1)) performed a graded incremental exercise test, 2 familiarisation trials, and 4 experimental trials. Trials consisted of cycling to volitional exhaustion at 100% Wpeak (TLIM) 60 min after ingesting a solution containing either (i) 0.3 g·kg(-1) body mass sodium bicarbonate (BIC), (ii) 5 mg·kg(-1) body mass caffeine plus 0.1 g·kg(-1) body mass sodium chloride (CAF), (iii) 0.3 g·kg(-1) body mass sodium bicarbonate plus 5 mg·kg(-1) body mass caffeine (BIC-CAF), or (iv) 0.1 g·kg(-1) body mass sodium chloride (PLA). Experimental solutions were administered double-blind. Pre-exercise, at the end of exercise, and 5-min postexercise blood pH, base excess, and bicarbonate ion concentration ([HCO3(-)]) were significantly elevated for BIC and BIC-CAF compared with CAF and PLA. TLIM (median; interquartile range) was significantly greater for CAF (399; 350-415 s; P = 0.039; r = 0.6) and BIC-CAF (367; 333-402 s; P = 0.028; r = 0.6) compared with BIC (313: 284-448 s) although not compared with PLA (358; 290-433 s; P = 0.249, r = 0.3 and P = 0.099 and r = 0.5, respectively). There were no differences between PLA and BIC (P = 0.196; r = 0.4) or between CAF and BIC-CAF (P = 0.753; r = 0.1). Relatively large inter- and intra-individual variation was observed when comparing treatments and therefore an individual approach to supplementation appears warranted.
Affiliation:
University of Derby
Citation:
Higgins, M. F. et al (2016) 'Evaluating the effects of caffeine and sodium bicarbonate, ingested individually or in combination, and a taste-matched placebo on high-intensity cycling capacity in healthy males'. Appl Physiol Nutr Metab, 41 (4):354-61
Publisher:
NRC Research Press
Journal:
Applied physiology, nutrition, and metabolism
Issue Date:
2016
URI:
http://hdl.handle.net/10545/621154
DOI:
10.1139/apnm-2015-0371
PubMed ID:
26988768
Additional Links:
http://www.nrcresearchpress.com/doi/10.1139/apnm-2015-0371#.WFGW801viUk
Type:
Article
Language:
en
ISSN:
17155320
Sponsors:
Coventry University
Appears in Collections:
Department of Life Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorHiggins, Matthew F.en
dc.contributor.authorWilson, Susieen
dc.contributor.authorHill, Cameronen
dc.contributor.authorPrice, Michael J.en
dc.contributor.authorDuncan, Michael J.en
dc.contributor.authorTallis, Jasonen
dc.date.accessioned2016-12-14T19:04:16Z-
dc.date.available2016-12-14T19:04:16Z-
dc.date.issued2016-
dc.identifier.citationHiggins, M. F. et al (2016) 'Evaluating the effects of caffeine and sodium bicarbonate, ingested individually or in combination, and a taste-matched placebo on high-intensity cycling capacity in healthy males'. Appl Physiol Nutr Metab, 41 (4):354-61en
dc.identifier.issn17155320-
dc.identifier.pmid26988768-
dc.identifier.doi10.1139/apnm-2015-0371-
dc.identifier.urihttp://hdl.handle.net/10545/621154-
dc.description.abstractThis study evaluated the effects of ingesting sodium bicarbonate (NaHCO3) or caffeine individually or in combination on high-intensity cycling capacity. In a counterbalanced, crossover design, 13 healthy, noncycling trained males (age: 21 ± 3 years, height: 178 ± 6 cm, body mass: 76 ± 12 kg, peak power output (Wpeak): 230 ± 34 W, peak oxygen uptake: 46 ± 8 mL·kg(-1)·min(-1)) performed a graded incremental exercise test, 2 familiarisation trials, and 4 experimental trials. Trials consisted of cycling to volitional exhaustion at 100% Wpeak (TLIM) 60 min after ingesting a solution containing either (i) 0.3 g·kg(-1) body mass sodium bicarbonate (BIC), (ii) 5 mg·kg(-1) body mass caffeine plus 0.1 g·kg(-1) body mass sodium chloride (CAF), (iii) 0.3 g·kg(-1) body mass sodium bicarbonate plus 5 mg·kg(-1) body mass caffeine (BIC-CAF), or (iv) 0.1 g·kg(-1) body mass sodium chloride (PLA). Experimental solutions were administered double-blind. Pre-exercise, at the end of exercise, and 5-min postexercise blood pH, base excess, and bicarbonate ion concentration ([HCO3(-)]) were significantly elevated for BIC and BIC-CAF compared with CAF and PLA. TLIM (median; interquartile range) was significantly greater for CAF (399; 350-415 s; P = 0.039; r = 0.6) and BIC-CAF (367; 333-402 s; P = 0.028; r = 0.6) compared with BIC (313: 284-448 s) although not compared with PLA (358; 290-433 s; P = 0.249, r = 0.3 and P = 0.099 and r = 0.5, respectively). There were no differences between PLA and BIC (P = 0.196; r = 0.4) or between CAF and BIC-CAF (P = 0.753; r = 0.1). Relatively large inter- and intra-individual variation was observed when comparing treatments and therefore an individual approach to supplementation appears warranted.en
dc.description.sponsorshipCoventry Universityen
dc.language.isoenen
dc.publisherNRC Research Pressen
dc.relation.urlhttp://www.nrcresearchpress.com/doi/10.1139/apnm-2015-0371#.WFGW801viUken
dc.rightsArchived with thanks to Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolismeen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectCaffeineen
dc.subjectSodium bicarbonateen
dc.subjectAlkalosisen
dc.subjectMetabolic buffersen
dc.subjectCyclingen
dc.titleEvaluating the effects of caffeine and sodium bicarbonate, ingested individually or in combination, and a taste-matched placebo on high-intensity cycling capacity in healthy malesen
dc.title.alternativePhysiologie appliquee, nutrition et metabolismeen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalApplied physiology, nutrition, and metabolismen
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