One-Week L-Arginine Supplementation Had No Effect on 200m Freestyle Swimming Time Trial in Moderately-Trained Male Swimmers.
| Autor: | Esen, Ozcan, Karayigit, Raci |
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| Předmět: |
EXPERIMENTAL design
CONFIDENCE intervals ONE-way analysis of variance TIME OXYGEN consumption ARGININE DIETARY supplements RANDOMIZED controlled trials PLACEBOS COMPARATIVE studies BLIND experiment DESCRIPTIVE statistics REPEATED measures design BLOOD circulation LACTATES SWIMMING ATHLETIC ability STATISTICAL sampling CROSSOVER trials DATA analysis software |
| Zdroj: | Journal of Dietary Supplements; 2023, Vol. 20 Issue 5, p777-787, 11p |
| Abstrakt: | Research on the effect of L-arginine supplementation on exercise performance is still inconsistent and its influence on single-bout swimming performance has not been investigated. Therefore, the aim of this study was to assess if one-week L-arginine supplementation would enhance 200-m freestyle swimming performance in trained/developmental (regularly training ∼3 times per week with a purpose to compete) male swimmers. In a randomized, cross-over, double-blind design, 8 trained/developmental male swimmers (age 25 ± 5 years; mean ± SD) completed 200-m freestyle swimming time-trial on 3 separate occasions: a control trial; and after 2 separate 7-d supplementation periods, with a daily dose of either 8 g/d of L-arginine or placebo trials. Blood lactate concentration was measured immediately post time-trial swimming. Completion time of the 200-m freestyle swimming time-trial did not differ significantly (F = 4.55; P = 0.060; ŋp2 = 0.394) between control (149.40 ± 9.88 s), L-arginine (146.02 ± 10.34 s) and placebo trials (147.58 ± 10.86 s). There was no statistically significant difference in post time-trial swimming blood lactate concentration between trials (control: 11.2 ± 2.7; L-arginine: 13.1 ± 1.8; Placebo: 12.2 ± 2.7, F = 3.52; P = 0.058; ŋp2 = 0.335). One-week of supplementation with 8 g/d of L-arginine, had no ergogenic effect on middle-distance (200-m), freestyle swimming performance in trained/developmental male swimmers. [ABSTRACT FROM AUTHOR] |
| Databáze: | Complementary Index |
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