Can DHA Reduce Muscle Soreness?

We've all experienced it—that soreness that sets in a day or two after a tough workout. Walking downstairs becomes a challenge, your legs feel heavy, and getting back into the gym sounds less appealing than another rest day.

This phenomenon is called delayed onset muscle soreness (DOMS), and while it's a normal part of training, it can interfere with performance, recovery, and consistency.

A new study published in the European Journal of Nutrition suggests there may be a simple nutritional strategy to reduce that soreness: docosahexaenoic acid (DHA), one of the primary omega-3 fatty acids found in fish oil.

Even more interesting? Participants experienced these benefits using a dietary achievable dose of DHA—far less than many previous studies had tested. :contentReference[oaicite:0]{index=0}

What Is Delayed Onset Muscle Soreness (DOMS)?

DOMS typically develops 12 to 48 hours after unfamiliar or high-intensity exercise, especially workouts that emphasize eccentric contractions—the muscle-lengthening portion of a movement.

Examples include:

Lowering into a squat
Running downhill
Lowering a dumbbell during a curl
Heavy negatives during strength training

Although soreness isn't always a sign of an effective workout, excessive DOMS can reduce performance, limit training quality, and delay your return to the gym.

What Is DHA?

DHA (docosahexaenoic acid) is a long-chain omega-3 fatty acid naturally found in fatty fish such as salmon, sardines, and mackerel.

Most people know DHA for its role in:

Brain health
Eye health
Heart health

But researchers are increasingly discovering that DHA also plays an important role in exercise recovery and inflammation resolution.

Unlike medications that simply suppress inflammation, DHA appears to help the body actively resolve inflammation through compounds called specialized pro-resolving mediators (SPMs). These compounds help coordinate tissue repair without completely shutting down the body's natural healing response. :contentReference[oaicite:1]{index=1}

The Study: Can DHA Improve Recovery?

Researchers recruited physically trained men and women and assigned them to either a DHA supplement or a control group for 12 weeks.

After supplementation, participants completed a demanding eccentric cycling workout designed to reliably produce muscle soreness and temporary reductions in strength and power.

The researchers then measured:

Muscle soreness (DOMS)
Jump performance
Strength
Inflammatory markers
Creatine kinase (CK), a marker of muscle damage

The Results: Over 50% Less Muscle Soreness

The biggest finding was impossible to ignore.

After three months of DHA supplementation, participants experienced:

56% less overall muscle soreness
Significantly lower soreness at both 24 and 48 hours after exercise
A large effect size (Cohen's d = 0.95)

Even more importantly, the reduction wasn't just statistically significant—it was considered clinically meaningful. Participants reported pain reductions of approximately 16–17 mm on a 100-mm visual analog scale, exceeding the threshold considered noticeable in real-world settings. :contentReference[oaicite:2]{index=2} :contentReference[oaicite:3]{index=3}

Recovery Was Faster, Too

Soreness wasn't the only thing that improved.

Compared to the control group, participants taking DHA recovered physical performance more quickly after exercise.

Researchers found:

Smaller reductions in countermovement jump height
Better preservation of peak force production
Improved recovery of explosive strength

These improvements suggest that DHA may help athletes return to high-quality training sooner after demanding workouts. :contentReference[oaicite:4]{index=4} :contentReference[oaicite:5]{index=5}

Did DHA Reduce Muscle Damage?

Interestingly, not exactly.

Blood levels of creatine kinase (CK), a common marker of muscle damage, increased similarly in both groups after exercise.

In other words, DHA didn't appear to prevent muscle damage itself.

Instead, it likely helped participants recover more efficiently by influencing how the body responded after the damage occurred. :contentReference[oaicite:6]{index=6}

How Does DHA Work?

Researchers believe several mechanisms may explain these benefits.

As DHA becomes incorporated into cell membranes over time, it can be converted into specialized pro-resolving mediators (SPMs), compounds that help bring inflammation to a healthy conclusion rather than simply suppressing it.

This distinction matters.

Unlike frequent use of non-steroidal anti-inflammatory drugs (NSAIDs), which may interfere with muscle adaptations to training, DHA appears to support the body's natural recovery process while preserving the beneficial aspects of exercise-induced inflammation. :contentReference[oaicite:7]{index=7}

Why Supplement Duration Matters

One of the most interesting findings wasn't about dosage—it was about time.

Many earlier studies lasting only 3–4 weeks found little or no benefit from omega-3 supplementation.

In contrast, this study lasted 12 weeks, allowing DHA to become incorporated into red blood cell membranes, as reflected by a significant increase in participants' Omega-3 Index.

The authors note that DHA incorporation into muscle and cell membranes takes several weeks, which likely explains why longer supplementation periods consistently produce better recovery outcomes. :contentReference[oaicite:8]{index=8}

How Much DHA Did Participants Take?

One of the most encouraging aspects of this research is that the investigators used a dietary achievable dose of DHA rather than the very high fish oil doses often used in earlier studies.

This suggests that meaningful recovery benefits may be possible without consuming several grams of combined EPA and DHA each day. :contentReference[oaicite:9]{index=9}

Note: Always follow the serving recommendations on your supplement and consult a healthcare professional if you have medical conditions or take blood-thinning medications.

Who Might Benefit Most?

DHA supplementation may be especially helpful for:

Strength athletes
CrossFit athletes
Runners
Cyclists
Team-sport athletes
Anyone training multiple days per week

If your workouts regularly leave you too sore to train again for several days, improving recovery may help you maintain greater consistency over time.

The Bottom Line

Muscle soreness is part of training—but excessive soreness doesn't have to be.

This new research suggests that taking DHA consistently for several months may reduce delayed onset muscle soreness by more than 50%, improve recovery of strength and power, and help athletes get back to quality training sooner.

While DHA won't eliminate hard workouts or replace proper nutrition, sleep, and smart programming, it may be one of the most overlooked recovery supplements supported by emerging evidence.

Sometimes the biggest performance gains don't come from training harder—they come from recovering better.

Frequently Asked Questions

Does DHA help reduce muscle soreness?

Yes. In this study, DHA supplementation reduced overall delayed onset muscle soreness (DOMS) by 56% compared with the control group after 12 weeks of supplementation.

How long does DHA take to work?

The greatest benefits were observed after 12 weeks, supporting the idea that DHA needs time to become incorporated into cell membranes before its full recovery effects are realized.

Is DHA better than taking NSAIDs for soreness?

DHA works differently. Rather than suppressing inflammation like NSAIDs, DHA appears to support the body's natural inflammation-resolution process, which may aid recovery without interfering with training adaptations.

Can DHA improve athletic recovery?

Research suggests DHA may reduce muscle soreness, preserve strength and power after intense exercise, and improve overall recovery in physically active individuals.

References

Anthony R, et al. A Dietary Achievable Dose of DHA Attenuates Delayed Onset Muscle Soreness and Improves Neuromuscular Recovery Following Eccentric Exercise in Trained Adults. European Journal of Nutrition. 2026.
Ramos-Campo DJ, et al. (2020). Supplementation of re-esterified DHA and EPA reduces inflammatory and muscle damage markers after exercise in endurance athletes. Nutrients.
Heileson JL, et al. (2024). Long-chain omega-3 fatty acid supplementation and exercise-induced muscle damage: EPA or DHA? Medicine & Science in Sports & Exercise.
Calder PC. (2017). Omega-3 fatty acids and inflammatory processes: From molecules to man. Biochemical Society Transactions.
Serhan CN, Levy BD. (2018). Resolvins in inflammation: Emergence of the pro-resolving superfamily of mediators. Journal of Clinical Investigation.