Effects of Curcumin and Fenugreek Soluble Fiber on the Physical Working Capacity at the Fatigue Threshold, Peak Oxygen Consumption, and Time to Exhaustion
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Lauren P. Herrick [1] ; Jensen Goh [1] ; Walter Menke [1] ; Marilyn S. Campbell [1] ; Bradley S. Fleenor [2] ; Mark G. Abel [1] ; Haley C. Bergstrom [1]
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[1] University of Kentucky
University of Kentucky
Estados Unidos
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[2] Ball State University
Ball State University
Township of Center, Estados Unidos
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- Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 34, Nº. 12, 2020, págs. 3346-3355
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
The purpose of this study was to examine the effects of curcumin in combination with fenugreek soluble fiber (CUR + FEN) or fenugreek soluble fiber alone (FEN) on the neuromuscular fatigue threshold (PWCFT), peak oxygen consumption (V[spacing dot above]o2peak), and time to exhaustion (Tlim) on a graded exercise test (GXT), in untrained subjects. The PWCFT estimates the highest power output that can be maintained without evidence of neuromuscular fatigue. Forty-seven untrained, college-aged subjects were randomly assigned to one of 3 supplementation groups; placebo (PLA, n = 15), CUR + FEN (500 mg[middle dot]d-1, n = 18), or FEN (300 mg[middle dot]d-1, n = 14). The subjects completed a maximal GXT on a cycle ergometer to determine the PWCFT, V[spacing dot above]o2peak, and Tlim before (PRE) and after (POST) 28 days of daily supplementation. Surface electromyographic signals were recorded from a bipolar electrode arrangement on the vastus lateralis of the right leg during each test. Separate one-way analysis of covariances were used to determine if there were between-group differences for adjusted POST-PWCFT, POST-V[spacing dot above]o2peak, and POST-Tlim values, covaried for the respective PRE-test scores. The adjusted POST-PWCFT for the CUR + FEN group (mean +/- SD: 196 +/- 58 W) was greater (p = 0.016) than the PLA group (168 +/- 49 W) but the FEN group (185 +/- 32 W) was not different from the CUR + FEN or PLA groups (p > 0.05). There were no differences for adjusted POST-V[spacing dot above]o2peak (p = 0.612) or POST-Tlim (p = 0.508) among the groups. These findings suggested curcumin combined with fenugreek soluble fiber might delay neuromuscular fatigue.
