Effect of New Zealand Blackcurrant Extract on Force Steadiness of the Quadriceps Femoris Muscle during Sustained Submax-imal Isometric Contraction

Cook, Matthew D., Dunne, Aaron, Bosworth, Michael and Willems, Mark E. T. (2022) Effect of New Zealand Blackcurrant Extract on Force Steadiness of the Quadriceps Femoris Muscle during Sustained Submax-imal Isometric Contraction. Journal of Functional Morphology and Kinesiology, 7 (2). pp. 1-9. ISSN 2411-5142

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Abstract

Intake of anthocyanin-rich New Zealand blackcurrant (NZBC) can alter physiological responses that enhance exercise performance. In two studies, we examined the effects of NZBC extract on the force steadiness during a sustained submaximal isometric contraction of the quad-riceps femoris muscle. With repeated measures designs, male participants in study one (n=13) and study two (n=19) performed a 120-second submaximal (30%) isometric contraction of the quadriceps femoris muscle following 7-day intake of NZBC extract and placebo (study one) and following 0 (control), 1, 4 and 7-day intake of NZBC extract (study two). Participants for both studies were different. In study one, NZBC extract enhanced isometric force steadiness during the 120-second contraction (placebo: 6.58±2.24%, NZBC extract: 6.05±2.24%, P=0.003), with differ-ences in the third (60-89 s) and fourth quartile (90-120 s) of the contraction. In study two, isomet-ric force steadiness was not changed following 1 and 4 days but was enhanced following 7-day intake of NZBC extract in comparison to control. In study two, the enhanced isometric force steadiness following 7-day intake did occur in the second (30-59 s), third (60-89 s) and fourth (90-120 s) quartiles. Daily supplementation of anthocyanin-rich NZBC extract can enhance force steadiness of the quadriceps femoris muscle during a sustained submaximal isometric contrac-tion. Our observations may have implications for human tasks that require postural stability.

Item Type: Article
Additional Information: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Cook, M. D., Dunne, A., Bosworth, M., & Willems, M. E. T. (2022). Effect of New Zealand Blackcurrant Extract on Force Steadiness of the Quadriceps Femoris Muscle during Sustained Submaximal Isometric Contraction. Journal of Functional Morphology and Kinesiology, 7(2), 44. MDPI AG. Retrieved from http://dx.doi.org/10.3390/jfmk7020044
Subjects: Q Science > Q Science (General)
Q Science > QP Physiology
Divisions: Academic Areas > Institute of Sport > Area > Exercise Physiology
Related URLs:
Depositing User: Mark Willems
Date Deposited: 08 Jun 2022 13:22
Last Modified: 09 Jun 2022 12:45
URI: https://eprints.chi.ac.uk/id/eprint/6296

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