Blackcurrant May Boost Strength and Focus, but Not Sprint Power

Why It Matters

The findings suggest NZBC could be a low‑risk, nutrition‑based ergogenic aid for strength athletes, while also offering cognitive benefits, highlighting a niche for functional‑food supplements in performance training.

Key Takeaways

• Low‑dose NZBC (250 mg) raised total lifting volume in 20 adults.
• High‑dose NZBC (600 mg) modestly increased muscle‑power output.
• Neither dose improved 30‑second all‑out cycling sprint performance.
• Both doses enhanced Stroop test scores, indicating better cognition.
• Study suggests vascular benefits may underlie strength gains.

Pulse Analysis

Anthocyanin‑rich fruits such as New Zealand blackcurrant have attracted scientific interest for their potential to enhance athletic performance. The compounds boost nitric‑oxide production, improve endothelial function, and reduce oxidative stress, mechanisms that can support blood flow and oxygen delivery during exercise. Prior research has produced mixed results, with some endurance studies showing benefits while others report no effect, leaving the supplement’s role in resistance training largely unsettled.

In a tightly controlled, double‑blind crossover design, twenty resistance‑trained participants completed four seven‑day conditions: no supplement, placebo, low‑dose NZBC (250 mg), and high‑dose NZBC (600 mg). After a two‑hour absorption period, subjects performed strength tests, a 30‑second cycling sprint, and a Stroop cognitive assessment. Both NZBC doses increased bench‑press and leg‑press loads, especially for lower‑body lifts, with the low dose delivering the greatest total volume and the high dose offering a modest power edge. Cognitive performance improved across doses, while sprint power remained unchanged, underscoring a selective ergogenic profile.

The study’s modest sample size and short supplementation window limit definitive conclusions, but the observed strength and cognitive gains hint at a viable niche for NZBC in strength‑focused athletes and individuals seeking mental sharpness. Larger trials with diverse populations and mechanistic biomarkers are needed to confirm vascular and antioxidant pathways as the drivers of benefit. If replicated, supplement manufacturers could leverage these findings to market NZBC as a natural, low‑risk enhancer for resistance training and cognitive resilience, expanding the functional‑food market beyond traditional endurance‑oriented products.