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Related Experiment Video

Updated: Jul 9, 2025

Induction and Assessment of Exertional Skeletal Muscle Damage in Humans
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Long-Chain Omega-3 Fatty Acid Supplementation and Exercise-Induced Muscle Damage: EPA or DHA?

Jeffery L Heileson, Dillon R Harris1, Sara Tomek2

  • 1Department of Health, Human Performance and Recreation, Baylor University, Waco, TX.

Medicine and Science in Sports and Exercise
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Summary

Eicosapentaenoic acid (EPA) or docosahexaenoic acid (DHA) supplementation aids muscle recovery after exercise. Combined EPA and DHA did not show clear benefits, potentially blunting individual effects.

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Area of Science:

  • Exercise Physiology
  • Nutritional Science
  • Sports Medicine

Background:

  • Long-chain omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are investigated for their potential to accelerate recovery from exercise-induced muscle damage (EIMD).
  • The specific contributions of EPA and DHA, individually or in combination, to recovery from EIMD remain incompletely understood.

Purpose of the Study:

  • To determine the comparative effects of EPA, DHA, and a combined EPA + DHA formulation against a placebo on muscular recovery following EIMD.
  • To elucidate whether individual omega-3 fatty acids or their combination offers superior benefits for muscle repair and function restoration.

Main Methods:

  • Thirty male participants were randomized into four groups receiving daily supplementation of EPA + DHA, EPA alone, DHA alone, or a placebo (PL) for seven weeks.
  • A standardized EIMD protocol involving downhill running and jumping lunges was administered, followed by comprehensive assessments of muscle damage, soreness, function, and inflammation throughout the recovery period.
  • Erythrocyte omega-3 index (O3i) was monitored to confirm tissue uptake and status of EPA and DHA.

Main Results:

  • Supplementation with EPA, DHA, or EPA + DHA significantly increased the O3i compared to placebo.
  • Both EPA and DHA groups demonstrated improved leg press performance at 24 and 72 hours compared to placebo.
  • Muscle soreness was reduced at 48 hours in the DHA and EPA groups versus placebo, while the EPA + DHA group showed a trend towards attenuated soreness and strength loss.

Conclusions:

  • Daily supplementation with 4g of EPA or DHA for 52 days demonstrably improves specific markers of recovery from EIMD.
  • Combined EPA + DHA supplementation did not yield significant recovery enhancements and may potentially diminish the benefits observed with individual EPA or DHA administration.
  • Individual omega-3 fatty acids (EPA, DHA) show promise in enhancing muscle recovery, suggesting differential roles or optimal ratios for EIMD management.