The effects of beta-alanine supplementation and high-intensity interval training on neuromuscular fatigue and muscle function

Abbie E. Smith, Jordan R. Moon, Kristina L. Kendall, Jennifer L. Graef, Christopher M. Lockwood, Ashley A. Walter, Travis W. Beck, Joel T. Cramer, Jeffrey R. Stout

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

The purpose of this study was to determine the effects of beta-alanine supplementation and high-intensity interval training (HIIT) on electromyographic fatigue threshold (EMGFT) and efficiency of electrical activity (EEA). A total of 46 men completed four, 2-min work bouts on a cycle ergometer. Using bipolar surface electrodes, the EMG amplitude was averaged and plotted over the 2-min. The resulting slopes were used to calculate EMGFT and EEA. Following initial testing, all participants were randomly assigned to either placebo (PL; n = 18), beta-alanine (BA; n = 18) or control groups (CON; n = 10). Following randomization, participants engaged in 6 weeks of HIIT training. Significant improvements in EMGFT and EEA resulted for both training groups. In conclusion, HIIT appeared to be the primary stimulus effecting EMGFT or EEA, suggesting adaptations from HIIT may be more influential than increasing skeletal muscle carnosine levels on delaying fatigue in recreationally active men.

Original languageEnglish (US)
Pages (from-to)357-363
Number of pages7
JournalEuropean Journal of Applied Physiology
Volume105
Issue number3
DOIs
StatePublished - Jan 1 2009

Keywords

  • Muscle buffering capacity
  • Neuromuscular fatigue
  • Nutritional supplements
  • Training

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Public Health, Environmental and Occupational Health
  • Physiology (medical)

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    Smith, A. E., Moon, J. R., Kendall, K. L., Graef, J. L., Lockwood, C. M., Walter, A. A., Beck, T. W., Cramer, J. T., & Stout, J. R. (2009). The effects of beta-alanine supplementation and high-intensity interval training on neuromuscular fatigue and muscle function. European Journal of Applied Physiology, 105(3), 357-363. https://doi.org/10.1007/s00421-008-0911-7