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No effect of New Zealand blackcurrant extract on recovery of muscle damage following running a half-marathon

Research output: Contribution to journalArticle

  • Rianne Costello
  • Mark E.T. Willems
  • Stephen D. Myers
  • Dr Fiona Myers
  • Nathan A. Lewis
  • Ben J. Lee
  • Sam D. Blacker
New Zealand blackcurrant (NZBC) contains anthocyanins, known to moderate blood flow and display anti-inflammatory properties that may improve recovery from exercise-induced muscle damage. The authors examined whether NZBC extract supplementation enhances recovery from exercise-induced muscle damage after a half-marathon race. Following a randomized, double-blind, independent groups design, 20 (eight women) recreational runners (age 30 ± 6 years, height 1.73 ± 0.74 m, body mass 68.5 ± 7.8 kg, half-marathon finishing time 1:56:33 ± 0:18:08 hr:min:s) ingested either two 300-mg/day capsules of NZBC extract (CurraNZ™) or a visually matched placebo, for 7 days prior to and 2 days following a half-marathon. Countermovement jump performance variables, urine interleukin-6, and perceived muscle soreness and fatigue were measured pre, post, and at 24 and 48 hr after the half-marathon and analyzed using a mixed linear model with statistical significance set a priori at p < .05. The countermovement jump performance variables were reduced immediately post-half-marathon (p < .05), with all returning to pre-half-marathon levels by 48 hr, except the concentric and eccentric peak force and eccentric duration, with no difference in response between groups (p > .05). Urine interleukin-6 increased 48-hr post-half-marathon in the NZBC group only (p < .01) and remained unchanged compared with pre-half-marathon levels in the placebo group (p > .05). Perceived muscle soreness and fatigue increased immediately post-half-marathon (p < .01) and returned to pre-half-marathon levels by 48 hr, with no difference between groups (p > .05). Supplementation with NZBC extract had no effect on the recovery of countermovement jump variables and perceptions of muscle soreness or fatigue following a half-marathon in recreational runners.
Original languageEnglish
Pages (from-to)287-294
JournalInternational Journal of Sport Nutrition and Exercise Metabolism
Volume30
Issue number4
DOIs
Publication statusPublished - 1 Jul 2020

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  • No effect of New Zealand Blackcurrant Extract

    Rights statement: Accepted author manuscript version reprinted, by permission, from International Journal of Sport Nutrition and Exercise Metabolism, 2020, https://doi.org/10.1123/ijsnem.2019-0312. © Human Kinetics, Inc.

    Accepted author manuscript (Post-print), 832 KB, PDF document

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