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., Dambrós, B. F., Marques, B. S., da Silva, E. L., Vieira, F. G. K., Willems, M. E. T. and Di Pietro, P. F. (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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