Effect of New Zealand Blackcurrant Extract on Force Steadiness of the Quadriceps Femoris Muscle during Sustained Submaximal 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 Submaximal Isometric Contraction. Journal of Functional Morphology and Kinesiology, 7 (2). 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 force steadiness during a sustained submaximal isometric contraction of the quadriceps femoris muscle. With repeated measures designs, male participants in study one ( = 13) and study two ( = 19) performed a 120 s submaximal (30%) isometric contraction of the quadriceps femoris muscle following a 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 s contraction (placebo: 6.58 ± 2.24%, NZBC extract: 6.05 ± 2.24%, = 0.003), with differences in the third (60-89 s) and fourth quartile (90-120 s) of the contraction. In study two, isometric 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 contraction. Our observations may have implications for human tasks that require postural stability.

Item Type: Article
Additional Information: This is an open access article by Cook, M.D.; Dunne, A.; Bosworth, M.; Willems, M.E.T. Effect of New Zealand Blackcurrant Extract on Force Steadiness of the Quadriceps Femoris Muscle during Sustained Submaximal Isometric Contraction. J. Funct. Morphol. Kinesiol. 2022, 7, 44.
Uncontrolled Keywords: anthocyanins, blackcurrant, isometric force, balance, steadiness, anthocyanins; isometric force;
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
H Social Sciences > H Social Sciences (General)
Q Science > QP Physiology
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Academic Areas > Institute of Sport > Area > Exercise Physiology
Related URLs:
SWORD Depositor: Publications Router Jisc
Depositing User: Publications Router Jisc
Date Deposited: 13 Jul 2022 14:42
Last Modified: 02 Aug 2022 08:35
URI: https://eprints.chi.ac.uk/id/eprint/6364

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