Funded in part by Nippon Suisan Kaisha Ltd.
Effect of eicosapentaenoic acids-rich fish oil supplementation on motor nerve function after eccentric contractions
Ochi E, Tsuchiya Y, Yanagimoto K
Journal of the International Society of Sports Nutrition · 33 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Industry funded
- Government
- Japan Society for the Promotion of Science
- Company
- Nippon Suisan Kaisha Ltd.
- Grants
- Japan Society for the Promotion of Science (15K01558); Japan Society for the Promotion of Science (15K21426)
Based on 2 listed funder(s) and full-text disclosure statement.
Publication
- Published
- 2017-01-03 · J Int Soc Sports Nutr · vol. 14 · issue 1 · p. 23
- Publisher
- Springer Science+Business Media
- Cited
- 47 citations · more than 93% of similar papers · 3.7× the field average
- Impact
- Top 10% most cited in its field
- References
- 39 works
- Access
- Open access (journal) · CC-BY
- Research areas
- Exercise and Physiological Responses · Tendon Structure and Treatment · Sports injuries and prevention
- Keywords
- Medicine, Fish oil, Delayed onset muscle soreness, Eicosapentaenoic acid, Docosahexaenoic acid, Biceps, Isometric exercise, Placebo, Eccentric, Anesthesia, Physical therapy, Internal medicine, Surgery, Polyunsaturated fatty acid, Fatty acid, Biology, Fish <Actinopterygii>, Muscle damage, Fishery
- MeSH
- arm, muscle, skeletal, elbow joint, motor neurons, humans, docosahexaenoic acids, eicosapentaenoic acid, fish oils, range of motion, articular, double-blind method, isometric contraction, torque, dietary supplements, male, young adult, myalgia
3 authors
From JP
- Eisuke Ochi · correspondingHosei University
- Yosuke TsuchiyaTeikyo Heisei University
- Kenichi YanagimotoNippon Suisan Kaisha (Japan)
Abstract
Background
This study investigated the effect of supplementation with fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on the M-wave latency of biceps brachii and muscle damage after a single session of maximal elbow flexor eccentric contractions (ECC).
Methods
Twenty-one men were completed the randomized, double-blind, placebo-controlled, and parallel-design study. The subjects were randomly assigned to the fish oil group (n = 10) or control group (n = 11). The fish oil group consumed eight 300-mg EPA-rich fish oil softgel capsules (containing, in total, 600 mg EPA and 260 mg DHA) per day for 8 weeks before the exercise, and continued this for a further 5 days. The control group consumed an equivalent number of placebo capsules. The subjects performed six sets of ten eccentric contractions of the elbow flexors using a dumbbell set at 40% of their one repetition maximum. M-wave latency was assessed as the time taken from electrical stimulation applied to Erb's point to the onset of M-wave of the biceps brachii. This was measured before and immediately after exercise, and then after 1, 2, 3, and 5 days. Changes in maximal voluntary isometric contraction (MVC) torque, range of motion (ROM), upper arm circumference, and delayed onset muscle soreness (DOMS) were assessed at the same time points.
Results
Compared with the control group, M-wave latency was significantly shorter in the fish oil group immediately after exercise (p = 0.040), MVC torque was significantly higher at 1 day after exercise (p = 0.049), ROM was significantly greater at post and 2 days after exercise (post; p = 0.006, day 2; p = 0.014), and there was significantly less delayed onset muscle soreness at 1 and 2 days after exercise (day 1; p = 0.049, day 2; p = 0.023).
Conclusion
Eight weeks of EPA and DHA supplementation may play a protective role against motor nerve function and may attenuate muscle damage after eccentric contractions.
Trial registration
This trial was registered on July 14th 2015 (https://upload.umin.ac.jp/cgi-open-bin/ctr/index.cgi).
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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