Effects of New Zealand Blackcurrant Extract on Running Performance
Author Information
Author(s): Ian C. Perkins, Sam D. Blacker, Mark E. T. Willems
Primary Institution: University of Chichester
Hypothesis
NZBC extract intake would enhance high-intensity intermittent running capacity, measured by total running distance covered and distance covered during high-intensity running, but inter-individual variability would exist.
Conclusion
New Zealand blackcurrant extract can substantially enhance intermittent high-intensity running performance in consistent responders.
Supporting Evidence
- The NZBC extract increased the mean total running distance and mean high-intensity running distance by 7.9% and 8.0% compared to the placebo.
- 50% of participants enhanced their performance beyond the smallest worthwhile change for total running distance and high-intensity running distance.
- The study utilized a randomized, replicated double-blind, cross-over design.
Takeaway
This study found that taking New Zealand blackcurrant extract can help some athletes run better during intense exercise.
Methodology
The study used a double-blind, randomized, cross-over design with 16 active males completing high-intensity intermittent running tests under NZBC extract and placebo conditions.
Potential Biases
The study did not account for individual variations in training status and other lifestyle factors that could influence performance.
Limitations
Potential confounding factors such as training load, sleep, nutritional intake outside of the trial, and motivation were not recorded.
Participant Demographics
Sixteen healthy Caucasian males, mean age 23 years, recreationally active.
Statistical Information
P-Value
p = 0.071, p = 0.713, p = 0.121
Confidence Interval
95% CI [11.0, 22.4%]
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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