title: New Zealand Blackcurrant Extract Improves High-Intensity Intermittent Running.
abstract: We examined the effect of New Zealand blackcurrant (NZBC) extract on high-intensity intermittent running and postrunning lactate responses. Thirteen active males (age: 25 ± 4 yrs, height: 1.82 ± 0.07 m, body mass: 81 ± 14 kg, VO2max: 56 ± 4 ml·kg-1·min-1, vVO2max: 17.6 ± 0.8 km·h-1) performed a treadmill running protocol to exhaustion, which consisted of stages with 6 × 19 s of sprints with 15 s of low-intensity running between sprints. Interstage rest time was 1 min 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, randomized, crossover design, wash-out at least 14 days). Blood lactate was collected for 30 min postexhaustion. NZBC increased total running distance by 10.6% (NZBC: 4282 ± 833 m, placebo: 3871 ± 622 m, p = .02), with the distance during sprints increased by 10.8% (p = .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 = .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 = .07) of passive recovery. New Zealand blackcurrant extract (CurraNZ) may enhance performance in sports characterized 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.
authors: Dept. of Sport & Exercise Sciences, University of Chichester, Chichester, UK.
authors: Ian Craig
authors: IC
authors: Perkins
authors: Sarah Anne
authors: SA
authors: Vine
authors: Sam David
authors: SD
authors: Blacker
authors: Mark Elisabeth Theodorus
authors: ME
authors: Willems
mesh_terms: D000328:Adult; D000872:Anthocyanins / Q000008:administration & dosage; D054874:Athletic Performance / Q000502:physiology*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D017079:Exercise Tolerance / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010101:Oxygen Consumption / Q000187:drug effects; D010936:Plant Extracts / Q000494:pharmacology*; D031965:Ribes; D012420:Running / Q000502:physiology*; D064133:Sports Nutritional Physiological Phenomena / Q000187:drug effects*; D055815:Young Adult
chemical_list: D000872:Anthocyanins; D010936:Plant Extracts; D019344:Lactic Acid