University of Worcester Worcester Research and Publications

New Zealand Blackcurrant Extract Improves Cycling Performance and Fat Oxidation in Cyclists

Cook, Matthew ORCID:, Myers, S.D., Blacker, S.D. and Willems, M.E. (2015) New Zealand Blackcurrant Extract Improves Cycling Performance and Fat Oxidation in Cyclists. European Journal of Applied Physiology, 115 (11). pp. 2357-2365. ISSN Print: 1439-6319 Online: 1439-6327

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PURPOSE: Blackcurrant intake increases peripheral blood flow in humans, potentially by anthocyanin-induced vasodilation which may affect substrate delivery and exercise performance. We examined the effects of New Zealand blackcurrant (NZBC) extract on substrate oxidation, cycling time-trial performance and plasma lactate responses following the time-trial in trained cyclists. METHODS: Using a randomized, double-blind, crossover design, fourteen healthy men (age: 38 ± 13 years, height: 178 ± 4 cm, body mass: 77 ± 9 kg, V?O2max: 53 ± 6 ml·kg-1·min-1, mean ± SD) ingested NZBC extract (300 mg?day-1 CurraNZ™ containing 105 mg anthocyanin) or placebo (PL, 300 mg microcrystalline cellulose M102) for 7-days (washout 14-days). On day 7, participants performed 30 min of cycling (3x10 min at 45, 55 and 65% V?O2max), followed by a 16.1 km time-trial with lactate sampling during a 20-minute passive recovery. RESULTS: NZBC extract increased fat oxidation at 65% V?O2max by 27% (P < 0.05) and improved 16.1 km time-trial performance by 2.4% (NZBC: 1678 ± 108 s, PL: 1722 ± 131 s, P < 0.05). Plasma lactate was higher with NZBC extract immediately following the time-trial (NZBC: 7.06 ± 1.73 mmol?L-1, PL: 5.92 ± 1.58 mmol?L-1 P < 0.01). CONCLUSIONS: Seven days intake of New Zealand blackcurrant extract improves 16.1 km cycling time-trial performance and increases fat oxidation during moderate intensity cycling.

Item Type: Article
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Uncontrolled Discrete Keywords: time-trial, substrate oxidation, lactate, recovery, anthocyanin, indirect calorimetry, New Zeland blackcurrant, sports nutrition
Subjects: Q Science > Q Science (General)
Divisions: College of Business, Psychology and Sport > School of Sport and Exercise Science
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Depositing User: Karol Kosinski
Date Deposited: 14 Dec 2017 10:44
Last Modified: 17 Jun 2020 17:20

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