Juçara (Euterpe edulis Martius) improves time-to-exhaustion cycling performance and increased reduced glutathione: A randomized, placebo-controlled, crossover, and triple-blind study

Copettia, C. L. K., Diefenthaeler, F., Lanferdini, F. J.et al (2024) Juçara (Euterpe edulis Martius) improves time-to-exhaustion cycling performance and increased reduced glutathione: A randomized, placebo-controlled, crossover, and triple-blind study. Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme, 49 (7). pp. 933-942. ISSN 1715-5320

[thumbnail of Copetti, C. L. K. et al, Juçara (Euterpe edulis Martius) improves time-to-exhaustion cycling performance and increased reduced glutathione:  Applied Physiology, Nutrition, and Metabolism.  https://doi.org/10.1139/apnm-2023-0376]
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Text (Copetti, C. L. K. et al, Juçara (Euterpe edulis Martius) improves time-to-exhaustion cycling performance and increased reduced glutathione: Applied Physiology, Nutrition, and Metabolism. https://doi.org/10.1139/apnm-2023-0376)
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Abstract

Purpose: To examine the effects of 7-days juçara powder intake on oxidative stress biomarkers and endurance and sprint cycling performances. Methods: In a randomized, placebo-controlled, crossover, and triple-blind study, 20 male trained cyclists were assigned to intake 10 g of juçara powder (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 hour before (T-1), immediately after (T0), and 1 hour after (T1) the cycling TTE. Results: 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 ANOVA 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. Conclusions: Seven-day intake of JP improved cycling endurance performance and increased GSH levels but had no effect on lactate and cycling sprint-induced fatigue.

Publication Type: Articles
Uncontrolled Keywords: anthocyanins; supplementation; exercise; cycling; sports nutrition
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV201 Physical education and training
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports > GV711 Coaching
Q Science > QP Physiology
Divisions: Academic Areas > Institute of Sport > Area > Exercise Physiology
Academic Areas > Institute of Sport > Research Theme > Enhancing Sport Performance
Academic Areas > Institute of Sport > Research Theme > Health and Well-Being
Academic Areas > Institute of Sport > Research Theme > Nutritional Supplementation
Research Entities > Centre for Health and Allied Sport and Exercise Science Research (CHASER)
Depositing User: Mark Willems
Date Deposited: 27 Feb 2024 09:49
Last Modified: 10 Jul 2024 12:05
URI: https://eprints.chi.ac.uk/id/eprint/7383

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