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  • The effect of β-alanine supplementation on cycling time trials of different length

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    BellingerPUB894.pdf (124.8Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Bellinger, Phillip M
    Minahan, Clare L
    Griffith University Author(s)
    Minahan, Clare L.
    Bellinger, Phil M.
    Year published
    2016
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    Abstract
    The varying results reported in response to β-alanine supplementation may be related to the duration and nature of the exercise protocol employed. We investigated the effects of β-alanine supplementation on a wide range of cycling performance tests in order to produce a clear concise set of criteria for its efficacy. Fourteen trained cyclists (Age = 24.8 ± 6.7 years; VO2max = 65.4 ± 10.2 mL·kg·min−1) participated in this placebo-controlled, double-blind study. Prior to supplementation, subjects completed two (familiarization and baseline) supramaximal cycling bouts until exhaustion (120% pre-supplementation VO2max) and two ...
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    The varying results reported in response to β-alanine supplementation may be related to the duration and nature of the exercise protocol employed. We investigated the effects of β-alanine supplementation on a wide range of cycling performance tests in order to produce a clear concise set of criteria for its efficacy. Fourteen trained cyclists (Age = 24.8 ± 6.7 years; VO2max = 65.4 ± 10.2 mL·kg·min−1) participated in this placebo-controlled, double-blind study. Prior to supplementation, subjects completed two (familiarization and baseline) supramaximal cycling bouts until exhaustion (120% pre-supplementation VO2max) and two 1-, 4- and 10-km cycling time trial (TT). Subjects then supplemented orally for 4 weeks with 6.4 g/d placebo or β-alanine and repeated the battery of performance tests. Blood lactate was measured pre-exercise, post-exercise and 5  min post-exercise. β-alanine supplementation elicited significant increases in time to exhaustion (TTE) (17.6 ± 11.5 s; p = 0.013, effect compared with placebo) and was likely to be beneficial to 4-km TT performance time (−7.8 ± 8.1 s; 94% likelihood), despite not being statistically different (p = 0.060). Performance times in the 1- and 10-km TT were not affected by treatment. For the highly trained cyclists in the current study, β-alanine supplementation significantly extended supramaximal cycling TTE and may have provided a worthwhile improvement to 4-km TT performance. However, 1- and 10-km cycling TT performance appears to be unaffected by β-alanine supplementation.
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    Journal Title
    European Journal of Sport Science
    DOI
    https://doi.org/10.1080/17461391.2015.1120782
    Copyright Statement
    © 2015 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in European Journal of Sport Science on 11 Dec 2015, available online: http://www.tandfonline.com/doi/full/10.1080/17461391.2015.1120782
    Subject
    Mechanical engineering
    Sports science and exercise
    Sports science and exercise not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/101889
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    • Journal articles

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