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- Title
The effect of acute taurine ingestion on 4-km time trial performance in trained cyclists.
- Authors
Ward, Ryan; Bridge, Craig; McNaughton, Lars; Sparks, S.
- Abstract
Taurine (TAU) has been shown to improve exercise time to exhaustion and 3-km running performance; however, no studies have considered the effect of acute TAU ingestion on short duration cycling time trial (TT) performance. The aim of this study was to determine the effects of a single oral acute dose of 1000 mg of TAU on a laboratory simulated 4-km cycling TT. Eleven trained male cyclists performed three, 4-km TTs. The first of the trials was a familiarisation, followed by two subsequent trials which were performed two hours after the consumption of either 1000 mg of TAU or placebo (P), using a double-blind randomised crossover design. Capillary blood samples were obtained prior to the start and immediately after each TT for the measurement of lactate, pH and HCO . There was no effect of TAU ( p = 0.731, d = 0.151) on performance (390 ± 27 and 388 ± 21 s for TAU and P, respectively), nor were there any condition main effects for VO, lactate, pH, or HCO ( p > 0.05) despite post TT changes in lactate (7.3 ± 2.5 mmol l, p < 0.001, d = 2.86, 7.6 ± 2.0 mmol l p < 0.001, d = 3.75); pH (−0.255 ± 0.1, p < 0.001, d = 2.62, −0.258 ± 0.09, p < 0.001, d = 2.87); HCO (−13.58 ± 2.7 mmol l, p < 0.001, d = 5.04 vs. −13.36 ± 2.3, p < 0.001, d = 5.72 for TAU and P, respectively). The findings of this study suggest that a pre-exercise dose of 1000 mg TAU offers no performance advantage during 4-km TT nor does it alter the blood buffering responses in trained cyclists.
- Subjects
TAURINE; INGESTION; CYCLIST physiology; BLOOD sampling; DRUG dosage
- Publication
Amino Acids, 2016, Vol 48, Issue 11, p2581
- ISSN
0939-4451
- Publication type
Article
- DOI
10.1007/s00726-016-2282-4