No Effects of New Zealand Blackcurrant Extract on Physiological and Performance Responses in Trained Male Cyclists Undertaking Repeated Testing across a Week Period

Stefano Montanari, Mehmet A Şahin, Ben J Lee, Sam D Blacker, Mark E.T Willems

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)
    6 Downloads (Pure)

    Abstract

    Anthocyanin supplements are receiving attention due to purported benefits to physiological, metabolic, and exercise responses in trained individuals. However, the efficacy of anthocyanin intake over multiple testing days is not known. We compared a placebo and two doses of anthocyanin-rich New Zealand blackcurrant (NZBC) extract (300 and 600 mg·day-1) on plasma lactate, substrate oxidation, and 16.1 km time trial (TT) performance on three occasions over 7-days in a fed state (day 1 (D1), D4, and D7). Thirteen male cyclists participated in a randomized, crossover, placebo-controlled double-blind design. There was no difference in plasma lactate and substrate oxidation between conditions and between days. A time difference was observed between D1 (1701 ± 163 s) and D4 (1682 ± 162 s) for 600 mg (p = 0.05), with an increment in average speed (D1 = 34.3 ± 3.4 vs. D4 = 34.8 ± 3.4 km·h-1, p = 0.04). However, there was no difference between the other days and between conditions. Overall, one week of intake of NZBC extract did not affect physiological and metabolic responses. Intake of 600 mg of NZBC extract showed inconsistent benefits in improving 16.1 km time trial performance over a week period in trained fed cyclists.

    Original languageEnglish
    Article number114
    Pages (from-to)1-14
    Number of pages14
    JournalSports
    Volume8
    Issue number8
    DOIs
    Publication statusPublished - 13 Aug 2020

    Bibliographical note

    This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

    Funder

    Supplementation for the study was provided by Health Currancy Ltd., Camberley, UK and CurraNZ Ltd., Auckland, New Zealand.

    Keywords

    • sports nutrition
    • anthocyanins
    • substrate oxidation
    • lactate
    • cycling performance
    • repeated tests

    ASJC Scopus subject areas

    • Physical Therapy, Sports Therapy and Rehabilitation
    • Orthopedics and Sports Medicine

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