| Autor: |
Cross BL; Biodynamics and Human Performance Center, Georgia Southern University (Armstrong Campus), Savannah, GA, USA., Parker D; Biodynamics and Human Performance Center, Georgia Southern University (Armstrong Campus), Savannah, GA, USA., Langan SP; Biodynamics and Human Performance Center, Georgia Southern University (Armstrong Campus), Savannah, GA, USA., Grosicki GJ; Biodynamics and Human Performance Center, Georgia Southern University (Armstrong Campus), Savannah, GA, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
International journal of exercise science [Int J Exerc Sci] 2020 Feb 01; Vol. 13 (2), pp. 312-318. Date of Electronic Publication: 2020 Feb 01 (Print Publication: 2020). |
| Abstrakt: |
Capsaicin, the active pungent ingredient in chili peppers and various spicy foods, is demonstrated to influence a variety of physiological systems including skeletal muscle. The purpose of this study was to examine if a chewable capsaicin supplement (1.2 mg) could enhance isokinetic knee extensor contractile performance. Nine young, recreationally active individuals (5 females/4 males; 23.6 ± 1.5 yrs; 24.2 ± 3.3 kg/m 2 ) participated in this randomized, single-blind crossover study. Following a familiarization session, participants completed two isokinetic knee extensor contractile function assessments, 45 minutes after ingesting either a capsaicin fruit gummy or eucaloric placebo, the order of which was randomized. Knee extensor peak torque (strength), summed torque (endurance) and fatigue index (fatigue) were compared between trials. Knee extensor peak torque was significantly greater ( p < 0.05; d = 0.80) in the capsaicin (126.0 ± 40.4 N·m -1 ) than the placebo (118.8 ± 41.3 N·m -1 ) trial. No significant differences ( p > 0.05) were found for summed torque (8012 ± 2771 vs. 7823 ± 2611 N·m -1 ; d = 0.45) or fatigue index (56.0 ± 17.1 vs. 48.7 ± 21.0 %; d = 0.46) between capsaicin and placebo trials, respectively. These findings, in a relatively modest and mixed-gender sample, suggest that pre-exercise capsaicin ingestion may benefit knee extensor muscle strength but does not appear to affect parameters of skeletal muscle endurance or fatigue. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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