The effects of 5 days β-alanine supplementation on the velocity and the percentage o2max at the lactate threshold
Authors
Johnson, MatthewAdvisors
Morris, MikeFallows, Stephen
Publication Date
2010-09
Metadata
Show full item recordAbstract
Purpose: To assess the effect of 5 days β-alanine supplementation on the velocity and the percentage of O2max ¬¬ (%O2max) at the lactate threshold (Tlac) during treadmill running. Method: Using a double-blind, placebo-control, repeated measures, cross-over design, 6 participants (4 male, 2 female) undertook a Tlac test using a motorised treadmill on 3 separate occasions. For 5 days prior to each test participants ingested β-alanine (50mg∙kg-1∙d-1) or an equal amount of maltodextrin (placebo). Participants performed a control trial where no supplements were ingested prior to testing (control). The velocity, %O2max, O2, blood lactate, heart rate (HR) and RPE at the Tlac were measured during each trial. Significant differences between the 3 trials were assessed via one-way repeated-measures analysis of variance (p ≤ 0.05). Results: There was no significant difference (p = 0.369) in the velocity at the Tlac between the β-alanine (10.17 ± 0.98 km∙h-1), placebo (10.33 ± 1.03 km∙h-1) or the control trials (10.83 ± 1.16km∙h-1). There was no significant difference (p = 0.087) in %O2max at the Tlac between the β-alanine (75.21 ± 6.84%), placebo (75.93 ± 7.32%) or control trials (69.94 ± 7.39). This was coupled with a non significant difference in O2 between the 3 trials (p = 0.103). Blood lactate was not significantly different (p = 0.628) between the β-alanine, placebo and control trials (4.1 ± 1.2, 3.7 ± 1.5 and 4.0 ± 1.8mmol∙L, respectively). HR and RPE at the Tlac were unchanged between trials (p > 0.05). Conclusion: The data suggests that 5 days β-alanine supplementation has no effect on the velocity or %O2max at the Tlac during treadmill running. A five day supplementation period may not be sufficient to augment muscle carnosine concentrations to elicit an ergogenic effect.Publisher
University of ChesterType
Thesis or dissertationLanguage
enCollections
The following license files are associated with this item: