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The Effect of Acute Taurine Ingestion on Human Maximal Voluntary Muscle Contraction

Lim Zi Xiang; Singh, Anish; Leow, Zac Zi Xiang; Arthur, Peter G; Fournier, Paul A
Medicine & Science in Sports & Exercise: Post Acceptance: September 22, 2017
doi: 10.1249/MSS.0000000000001432
Original Investigation: PDF Only

AbstractPurposeTo examine the effect of taurine ingestion on maximal voluntary muscle torque and power in trained male athletes with different caffeine habits.MethodsFourteen male athletes aged 21.8 ± 2.5 years were separated into caffeine and non-caffeine consumers to control for the effect of caffeine withdrawal on muscle function. On separate occasions, participants performed four isokinetic or three maximal isometric knee extensions with and without taurine (40 mg/kg body mass) following a double blind, counterbalanced design. Muscle contractile performances were compared between the first sets as well as between the sets where these variables scored best.ResultsIn response to isokinetic contraction, taurine treatment in the non-caffeine consumers resulted in a significant fall in first (-16.1%; p=0.013) and best peak torque (-5.0%; p=0.016) as well as in first (-17.7%; p=0.015) and best power output (-8.0%; p=0.008). In the caffeine consumers deprived of caffeine, taurine intake improved best power (5.2%; p=0.045). With respect to the isometric variables, there was a significant decrease in the first (-5.1%; p=0.002) and best peak torque (-4.3%; p=0.032) in the non-caffeine group, but no effect in the group of caffeine consumers deprived of caffeine. Taurine ingestion increased blood taurine levels, but had no effect on plasma amino acid levels.ConclusionTaurine ingestion is detrimental to maximal voluntary muscle power and both maximal isokinetic and isometric peak torque in non-caffeine consumers, whereas taurine ingestion in caffeine-deprived caffeine consumers improves maximal voluntary muscle power but has not effect on other aspects of contractile performance.

Purpose

To examine the effect of taurine ingestion on maximal voluntary muscle torque and power in trained male athletes with different caffeine habits.

Methods

Fourteen male athletes aged 21.8 ± 2.5 years were separated into caffeine and non-caffeine consumers to control for the effect of caffeine withdrawal on muscle function. On separate occasions, participants performed four isokinetic or three maximal isometric knee extensions with and without taurine (40 mg/kg body mass) following a double blind, counterbalanced design. Muscle contractile performances were compared between the first sets as well as between the sets where these variables scored best.

Results

In response to isokinetic contraction, taurine treatment in the non-caffeine consumers resulted in a significant fall in first (-16.1%; p=0.013) and best peak torque (-5.0%; p=0.016) as well as in first (-17.7%; p=0.015) and best power output (-8.0%; p=0.008). In the caffeine consumers deprived of caffeine, taurine intake improved best power (5.2%; p=0.045). With respect to the isometric variables, there was a significant decrease in the first (-5.1%; p=0.002) and best peak torque (-4.3%; p=0.032) in the non-caffeine group, but no effect in the group of caffeine consumers deprived of caffeine. Taurine ingestion increased blood taurine levels, but had no effect on plasma amino acid levels.

Conclusion

Taurine ingestion is detrimental to maximal voluntary muscle power and both maximal isokinetic and isometric peak torque in non-caffeine consumers, whereas taurine ingestion in caffeine-deprived caffeine consumers improves maximal voluntary muscle power but has not effect on other aspects of contractile performance.

Corresponding author’s information: Zi Xiang Lim, School of Human Sciences & School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, Australia 6009, Telephone: (+61 8) 6488 1356, Fax: (+61 8) 6488 1039. Email address: zi.lim@research.uwa.edu.au

No funding was received for this study. There are no conflicts of interest for any of the authors. The results of the present study do not constitute endorsement by the American College of Sports Medicine. The authors declare that the results of the present study are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation.

Accepted for Publication: 15 September 2017

© 2017 American College of Sports Medicine