Acute Consumption of New Zealand Blackcurrant Extract Has No Effect on Cycling Performance in Normobaric Hypoxia with Trained Cyclists

Introduction: New Zealand Blackcurrant Extract (NZBC) is a popular ergogenic aid used to improve endurance performance. The aim of this research was determine the effects single bolus NZBC on 10-km time trial (TT) cycling performance in normobaric hypoxia. Methods: A double-blind, crossover design study conducted with trained cyclists. acute (900 mg) were compared placebo hypoxia (NH) (FiO2 = 15.5%). Testing comprised three laboratory-based visits for (1) familiarisation (and screening TT before entry into study), (2) and (3) NZBC, whereby completed one hour after consumption. After completion blood lactate assessed at four time-points 10 minutes following. Throughout TT, power output (PO), rating perceived exertion (RPE) heart rate (HR) recorded. Results: had no effect NH (1078.4 s [1009.4, 1147.4] 1071.0 [1006.4, 1137.5] respectively, p=0.31; d=-0.31). Additionally, difference observed mean (p=0.20; d=0.39), HR (p=0.76; d=0.09) or 1-km intervals (p=0.80), PO (p=0.77) RPE (p=0.41). Post exercise recovery did not differ between (p=0.42). Conclusion: Acute intake has simulated altitude.