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Beneficial Physiological Effects with Blackcurrant Intake in Endurance Athletes

Willems, M.E., Myers, S.D., Gault, M.L. and Cook, Matthew (2015) Beneficial Physiological Effects with Blackcurrant Intake in Endurance Athletes. International Journal of Sport Nutrition and Exercise Metabolism, 25 (4). pp. 367-374. ISSN Print: 1526-484X Online: 1543-2742

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Abstract

Blackcurrant contains anthocyanins, known to influence vasorelaxation and peripheral blood flow. We examined the effects of 7 days intake of Sujon New Zealand blackcurrant powder (6g/day) on the lactate curve, maximum oxygen uptake, and cardiovascular responses at rest and during cycling. Thirteen trained triathletes with >3 yrs experience (8 men, age: 38±8 yrs, body mass: 71±9 kg, BF%: 19±5%, mean±SD) performed two incremental cycling protocols with recording of physiological and cardiovascular responses (Portapres® Model 2). Cardiovascular function was also measured in rest. Experimental design was double-blind, placebo-controlled, randomized and cross-over (wash-out 4 wks). Data was analysed with two-tailed t-tests and 2-way ANOVA and significance accepted at p<0.05. Plasma lactate was lower at 40%, 50%, 60% and 70% of maximum power by 27%, 22%, 17% and 13%. Intensity at 4 mmol?L-1 OBLA was 6% higher with blackcurrant without effect on heart rate and oxygen uptake. Maximum values of oxygen uptake, heart rate and power were not affected by blackcurrant, but obtained with 14% lower lactate. In rest, blackcurrant increased stroke volume and cardiac output by 25% and 26%, and decreased total peripheral resistance by 16%, with no changes in blood pressure and heart rate. Cardiovascular responses during exercise at 40%, 50%, 60%, 70% and 80% intensity were not affected. Sujon New Zealand blackcurrant powder affects lactate production and/or clearance during exercise. Sujon New Zealand blackcurrant powder affects physiological and cardiovascular responses in rest and during exercise that may have implications for exercise performance.

Item Type: Article
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Uncontrolled Keywords: plasma lactate, cardiovascular function, New Zealand blackcurrant
Subjects: Q Science > Q Science (General)
Divisions: Academic Departments > Institute of Sport and Exercise Science
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Depositing User: Karol Kosinski
Date Deposited: 14 Dec 2017 10:48
Last Modified: 26 Jan 2018 15:02
URI: https://eprints.worc.ac.uk/id/eprint/6219

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