Evidence map›Paper›PMID 34693240›Full record

ArticleMetabolism open2021

Impact of varying doses of omega-3 supplementation on muscle damage and recovery after eccentric resistance exercise.

Lauren M Visconti, Joshua A Cotter, Evan E Schick, Noah Daniels, Frederick E Viray, Carson A Purcell, Cate B R Brotman, Karen E Ruhman, Kurt A Escobar

Open access · goldAbstract read
In one paragraph

Article in Metabolism open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 2 pooled it
1.2field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 2 syntheses or guidelines pooled it, 13 citations in OpenAlex.

  1. Effects of LCNutrients · 2026
    Pooled it
  2. Pooled it
  3. Trial
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 1 country.

Lauren M ViscontiPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Joshua A CotterPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Evan E SchickPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Noah DanielsPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Frederick E VirayPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Carson A PurcellPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Cate B R BrotmanPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Karen E RuhmanPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
Kurt A EscobarPhysiology of EXercise & Sport Lab, Department of Kinesiology, California State University Long Beach, Long Beach, CA, 90840, USA.
California State University, Long Beach · USSouthern California University of Health Sciences · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundExercise-induced muscle damage (EIMD) commonly occurs following intense resistance exercise and is associated with decrements in exercise performance and delayed muscle recovery. Thus, practical methods to attenuate EIMD would prove useful to both training and athletic populations. Omega-3 (n-3) supplementation has been shown to mitigate EIMD with evidence of increasing efficacy at higher doses (up to 6 g/day). However, data of its efficacy in trained individuals is limited. Therefore, this study investigated the effects of 6 and 8 g of n-3 supplementation on markers of muscle damage and muscle recovery after eccentric resistance exercise in resistance-trained males.

methodsUsing a double-blind, randomized, placebo-controlled design, 26 resistance trained males (23 ± 4 years; 173.6 ± 20.5 cm; 81.9 ± 9.7 kg; 14.2 ± 3.7% body fat) supplemented with 6 (n=10) or 8 g (n=7) of n-3 polyunsaturated fatty acids, or placebo (n=9) for 33 days. On day 30, participants performed a lower body muscle-damaging eccentric resistance exercise bout. Measures of muscle performance, soreness, and damage were taken pre-exercise on day 30 as well as on days 31-33, including vertical jump height (VJH), perceived muscle soreness (PMS), hip and knee range of motion (ROM), repetitions to fatigue (RTF) at 70% 1-RM, and serum creatine kinase (CK) while participants continued to supplement until day 33.

resultsThere were significant differences in VJH, PMS, and serum CK following the muscle-damaging exercise bout compared to pre-exercise (

conclusionsThirty-three days of 6 and 8 g of n-3 supplementation did not attenuate EIMD or enhance muscle recovery following muscle-damaging eccentric resistance exercise in resistance-trained males. Further research using various n-3 supplementation durations, doses, and eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) concentrations may be needed to establish its efficacy in attenuating EIMD, which may vary between trained and untrained individuals. Furthermore, while circulating CK is commonly used to assess muscle damage, elevated CK levels may not reflect muscle recovery status following muscle-damaging exercise.

Indexed as

Athletic performanceCK, creatine kinaseDHA, docosahexaenoic acidDietary supplementsDOMS, delayed-onset muscle sorenessEIMD, exercise-induced muscle damageEPA, eicosapentaenoic acidFatty acidsn-3, omega-3Omega-3PMS, perceived muscle sorenessResistance trainingROM, range of motionRTF, repetitions to fatigueSports nutritional sciencesVJH, vertical jump height

Identifiers

PMID34693240
PMCPMC8515381
OpenAlexW3207500653

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.