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Evaluation of High-Intensity Interval Training and Beta-Alanine Supplementation on Efficiency of Electrical Activity and Electromyographic Fatigue Threshold.
- Source :
- Journal of Strength & Conditioning Research; Jun2021, Vol. 35 Issue 6, p1535-1541, 7p
- Publication Year :
- 2021
-
Abstract
- The purpose of this study was to determine the effects of high-intensity interval training (HIIT) with or without β-alanine (BA) supplementation on the electromyographic fatigue threshold (EMG<subscript>FT</subscript>) and efficiency of electrical activity (EEA) in young women. Forty-four women (mean ± SD; age [yrs]: 21.7 ± 3.7; height [cm]: 166.3 ± 6.4; body mass [kg]: 66.1 ± 10.3) were randomly assigned to one of 3 treatment groups. The supplement groups performed HIIT on the cycle ergometer 3 times-wk<superscript>-1</superscript> for 6 weeks. Electromyographic fatigue threshold and EEA were assessed at baseline (PRE), after 3 weeks of training (MID), and after 6 weeks of HIIT (POST). Two 2-way mixed factorial analyses of variance (time [PRE vs. MID vs. POST] x treatment (BA vs. PL vs. CON)] were used to analyze EMG<subscript>FT</subscript> and EEA with a predetermined level of significance a of 0.05. For EMG<subscript>FT</subscript>, there was no interaction (p = 0.26) and no main effect for time (p = 0.28) nor treatment (p = 0.86); thus, there were no changes in EMG<subscript>FT</subscript> regardless of training or supplementation status. For EEA, there was no interaction (p = 0.70) nor treatment (p = 0.79); however, there was a main effect for time (p < 0.01). Our findings indicated that neither training nor supplementation was effective in improving EMG<subscript>FT</subscript> in women. Efficiency of electrical activity was altered, potentially because of a learning effect. Coaches and practitioners may not use these tests to monitor training status; however, they may find EEA as a useful tool to track cycling efficiency. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10648011
- Volume :
- 35
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Strength & Conditioning Research
- Publication Type :
- Academic Journal
- Accession number :
- 151181648
- Full Text :
- https://doi.org/10.1519/jsc.0000000000004038