Juçara ( Euterpe edulis Martius) improves time-to-exhaustion cycling performance and increased reduced glutathione: a randomized, placebo-controlled, crossover, and triple-blind study.
In: Applied physiology, nutrition, and metabolism = Physiologie appliquee, 2024-03-19
academicJournal
Zugriff:
To examine the effects of 7-days juçara powder (JP) intake on oxidative stress biomarkers and endurance and sprint cycling performances. In a randomized, placebo-controlled, crossover, and triple-blind study, 20 male trained cyclists were assigned to intake 10 g of JP (240 mg anthocyanins) or placebo (PLA) for 7 days and performed a cycling time-to-exhaustion (TTE). A 5 s cycling sprint was performed before and after the cycling TTE. Blood oxidative stress biomarkers and lactate concentration where evaluated 1 h before (T-1), immediately after (T0), and 1 h after (T1) the cycling TTE. The mean duration time for the cycling TTE was 8.4 ± 6.0% (63 ± 17 s) longer in the JP condition (JP: 751 ± 283 s) compared to PLA (688 ± 266 s) ( P < 0.019). Two-way repeated measures Analysis of variance showed an increase in the JP condition for reduced glutathione (GSH) ( P = 0.049) at T0 ( P = 0.039) and T1 ( P = 0.029) compared to PLA with a moderate effect size at T0 ( d = 0.61) and T1 ( d = 0.57). Blood lactate levels increased over time in both conditions ( P ≤ 0.001). No differences were observed for the post-TTE sprint fatigue index, total phenols, protein carbonyls, and glutathione peroxidase activity. Seven-day intake of JP improved cycling endurance performance and increased GSH levels but had no effect on lactate and cycling sprint-induced fatigue.
Competing Interests: The authors declare that they have no competing interests.
Titel: |
Juçara ( Euterpe edulis Martius) improves time-to-exhaustion cycling performance and increased reduced glutathione: a randomized, placebo-controlled, crossover, and triple-blind study.
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Autor/in / Beteiligte Person: | Copetti, CLK ; Diefenthaeler, F ; Lanferdini, FJ ; Dambrós, BF ; Marques, BS ; da Silva EL ; Vieira, FGK ; Willems, MET ; Pietro, PFD |
Zeitschrift: | Applied physiology, nutrition, and metabolism = Physiologie appliquee, 2024-03-19 |
Veröffentlichung: | Ahead of Print, 2024 |
Medientyp: | academicJournal |
ISSN: | 1715-5320 (electronic) |
DOI: | 10.1139/apnm-2023-0376 |
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