New Zealand Blackcurrant Extract Improves High-intensity Intermittent Running

Perkins, Ian, Vine, Sarah, Blacker, Sam D. and Willems, Mark E. T. (2015) New Zealand Blackcurrant Extract Improves High-intensity Intermittent Running. International Journal of Sports Nutrition and Exercise Metabolism, 25 (5). pp. 487-493. ISSN 1526-484X

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Abstract

We examined the effect of New Zealand blackcurrant (NZBC) extract on high-intensity intermittent running and post-running lactate responses. Thirteen active males (age: 25±4 yrs, height: 1.82±0.07 m, body mass: 81±14 kg, V̇O2max: 56±4 mL∙kg-1∙min-1, vV̇O2max: 17.6±0.8 km∙h-1) performed a treadmill running protocol to exhaustion, which consisted of stages with 6x19 s of sprints with 15 s of low-intensity running between sprints. Inter-stage rest time was 1 minute and stages were repeated with increasing sprint speeds. Subjects consumed capsuled NZBC extract (300 mg∙day-1 CurraNZ™; containing 105 mg anthocyanin) or placebo for 7 days (double blind, randomised, cross-over design, wash-out at least 14 days). Blood lactate was collected for 30 min post-exhaustion. NZBC increased total running distance by 10.6% (NZBC: 4282±833 m, placebo: 3871±622 m, P=0.02), with the distance during sprints increased by 10.8% (P=0.02). Heart rate, oxygen uptake, lactate and rating of perceived exertion were not different between conditions for the first 4 stages completed by all subjects. At exhaustion, blood lactate tended to be higher for NZBC (NZBC: 6.01±1.07 mmol∙L-1, placebo: 5.22±1.52 mmol∙L-1, P=0.07). There was a trend for larger changes in lactate following 15 min (NZBC: -2.89±0.51 mmol∙L-1, placebo: -2.46±0.39 mmol∙L-1, P=0.07) of passive recovery. New Zealand blackcurrant extract (CurraNZ™) may enhance performance in sports characterised by high-intensity intermittent exercise as greater distances were covered with repeated sprints, there was higher lactate at exhaustion, and larger changes in lactate during early recovery after repeated sprints to exhaustion.

Item Type: Article
Uncontrolled Keywords: anthocyanin, repeated sprints, recovery
Subjects: Q Science > QP Physiology
Divisions: Departments > Sport and Exercise Sciences
Related URLs:
Depositing User: Mark Willems
Date Deposited: 27 Mar 2015 11:44
Last Modified: 13 Mar 2019 16:42
URI: http://eprints.chi.ac.uk/id/eprint/1361

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