A comparison of the effects of different forms of caffeine supplementation on 5000-metre running performance

dc.contributor.affiliationEastern Institute of Technologyen_NZ
dc.contributor.authorWhalley, Peter John Harry
dc.description.abstractBACKGROUND Caffeine is a well established ergogenic aid to enhance sporting performance, and there is a variety of commercially available caffeine supplements. However, there is limited research investigating caffeine effects on running performance and comparing different forms of caffeine supplementation. AIM The purpose of this research was to compare how a moderate dose of caffeine (3- 4.5mg.kg⁻¹ of body mass), administered acutely and in three different supplementation forms (caffeine gum, tablets, and strips), affected 5000-metre track running performance. METHOD Using a randomised, placebo-controlled, crossover design, 10 males (mean ± SD, age 40 ± 9 years, body mass 73.4 ± 10.1kg, height 180.6 ± 10.2cm), and 4 females (age 40.7 ± 8.8 years, height 166.7 ± 6.8cm, body mass 58.5 ± 2kg), completed five x 5000-metre time trials. Trials were conducted at a self-paced maximal effort and took place on an outdoor 400-metre athletics track. Trials were spread over a 9-week period, separated by no less than 3 days and a maximum of 28 days. After conducting a familiarisation, participants ingested a single dose of caffeine (200mg for body mass <65kg or 300mg for body mass >65kg), 10-15 minutes before each trial, in the form of either caffeine chewing gum (CG), caffeine strips (CS), caffeine tablets (CT), or placebo (P). Performance and physiological measurements collected were total time, 800-metre lap pace, heart rate (HR) and rate of perceived exertion (RPE). On completion of each time trial, participants also provided a urine sample for analysis of caffeine and paraxanthine metabolites. RESULTS In comparison with P, caffeine supplementation improved running performance for CT = 2.0% ± 1.1%, CG= 0.9 ± 1.4% and CS= 1.2 ± 1.0 % (95% CL), with only CT significant (p=0.02). Overall pace trended faster in all caffeine trials compared with P and was significant in CT at 2600m-3400m (p=0.013) and 3400m-4200m (p=0.015). Acute caffeine supplementation did not affect HR or RPE. There was no relationship between the urinary concentration content of caffeine, paraxanthine, and associated metabolic ratio and running performance. CONCLUSION This study concludes that 3-4.5mg kg⁻¹ body mass of caffeine, consumed 10-15 minutes before exercise, can produce small yet significant improvements in 5000-metre running performance when taken in tablet form. However, why this only occurred in the tablet supplement is unclear and requires additional research.en_NZ
dc.identifier.bibliographicCitationWhalley, P. J. H. (2018). A comparison of the effects of different forms of caffeine supplementation on 5000-metre running performance. (Unpublished document submitted in partial fulfilment of the requirements for the degree of Master of Health Science). Eastern Institute of Technology (EIT), New Zealand. https://hdl.handle.net/10652/6045en_NZ
dc.rightsAll rights reserveden_NZ
dc.subjectergogenic aciden_NZ
dc.subjectcaffeine gumen_NZ
dc.subjectcaffeine stripsen_NZ
dc.subjectcaffeine tabletsen_NZ
dc.subjectrunning performanceen_NZ
dc.subjectrate of perceived exertion (RPE)en_NZ
dc.subjectcaffeine urinary metabolitesen_NZ
dc.subjecttime trialsen_NZ
dc.subject.marsden420702 Exercise physiologyen_NZ
dc.titleA comparison of the effects of different forms of caffeine supplementation on 5000-metre running performanceen_NZ
dc.typeMasters Thesisen_NZ
thesis.degree.grantorEastern Institute of Technology (EIT)en_NZ
thesis.degree.nameMaster of Health Scienceen_NZ
unitec.advisor.associatedDearing, Chey
unitec.advisor.principalPaton, Carl
unitec.institutionEastern Institute of Technology (EIT)en_NZ
unitec.institution.studyareaHealth Scienceen_NZ
unitec.publication.placeNew Zealanden_NZ
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