Vegan athletes experience significantly more muscle soreness after intense exercise than omnivores, reporting 2.7 points higher soreness on a 10-point scale at 24 hours post-workout, according to a 2026 study of 14 active adults. However, muscle damage markers in the blood and functional recovery were similar between groups. The vegans in the study consumed less than half the protein of omnivores (0.98 versus 2.14 grams per kilogram of body weight), suggesting that higher protein intake may reduce soreness without changing how quickly muscles recover their strength.
A new study compared how vegan and meat-eating athletes recovered after intense leg exercises. Both groups showed similar muscle damage markers in their blood, but vegans reported significantly more muscle soreness in the days following the workout. The vegans in the study ate about half the protein of the omnivores (0.98 grams per kilogram of body weight versus 2.14 grams). According to Gram Research analysis, while muscle recovery appeared similar between groups, the increased soreness in vegans suggests that getting enough protein and specific amino acids may help reduce post-workout discomfort.
Key Statistics
A 2026 study of 14 physically active adults found that vegan athletes reported 2.7 points more muscle soreness on a 10-point pain scale at 24 hours after intense leg exercise compared to omnivores, despite showing similar muscle damage markers in blood tests.
Vegan participants in the research consumed 0.98 grams of protein per kilogram of body weight daily, less than half the 2.14 grams consumed by omnivores, while also showing significantly lower intake of branched-chain amino acids.
Despite experiencing greater soreness, vegan athletes in the study demonstrated similar improvements in jumping ability and range of motion over 72 hours compared to omnivores, suggesting functional muscle recovery was not impaired.
Blood levels of creatine kinase, a marker of muscle damage, peaked at 24 hours after exercise in both vegan and omnivore groups and remained elevated relative to baseline, showing comparable muscle damage responses.
The Quick Take
- What they studied: Whether eating a low-protein vegan diet affects how muscles recover after intense exercise compared to eating a high-protein omnivore diet.
- Who participated: Fourteen physically active adults: 7 vegans and 7 meat-eaters. All participants were used to regular exercise and performed the same intense leg workout protocol.
- Key finding: Vegan athletes experienced about 2.7 points more muscle soreness on a pain scale at 24 hours and 2.6 points more at 72 hours after exercise, despite showing similar muscle damage markers in blood tests as omnivores.
- What it means for you: If you follow a vegan diet and exercise regularly, you may experience more muscle soreness after tough workouts, but your muscles may still recover functionally at the same rate. Eating more protein and amino acids could help reduce this soreness.
The Research Details
Researchers recruited 14 physically active people: 7 vegans and 7 omnivores (meat-eaters). Everyone performed the same intense lower-body workout using a Smith machine, doing squats and leg presses at 85 percent of their maximum strength. The researchers measured muscle damage and soreness at five time points: before exercise, immediately after, and then at 24, 48, and 72 hours later.
To assess muscle damage, they measured two enzymes in the blood (creatine kinase and lactate dehydrogenase) that leak out when muscle fibers are damaged. They also measured how sore participants felt, how high they could jump, and how far they could bend. Additionally, researchers tracked what everyone ate for four days using dietary recalls to compare protein intake between groups.
Both groups did the same amount of exercise and had similar hydration levels, making this a fair comparison. The main difference was that vegans naturally ate much less protein than omnivores.
This research design matters because it looks at real-world dietary patterns in active people rather than forcing artificial diets. By measuring multiple recovery markers (blood enzymes, soreness, jumping ability, and flexibility), the study captures a complete picture of recovery. This helps answer whether low protein intake actually affects how well muscles bounce back from hard exercise.
This is a small study with only 14 participants, which limits how much we can generalize the findings to all vegans and omnivores. The study was well-controlled in that both groups did identical exercise and researchers measured multiple outcomes. However, the small sample size means results should be viewed as preliminary and needing confirmation in larger studies. The study was published in a peer-reviewed journal, which adds credibility.
What the Results Show
Both vegan and omnivore athletes showed similar patterns of muscle damage after the intense workout. Blood levels of creatine kinase (an enzyme that indicates muscle damage) spiked immediately after exercise and peaked at 24 hours in both groups, then remained elevated compared to baseline. Lactate dehydrogenase showed the same pattern, rising immediately after exercise and staying elevated at 24 hours.
The key difference emerged in muscle soreness. Vegans reported significantly more soreness than omnivores at both 24 hours (2.7 points higher on a 10-point pain scale) and 72 hours (2.6 points higher). This difference was large enough to be clinically meaningful, meaning it would likely be noticeable to someone experiencing it.
Interestingly, when researchers tested functional recovery (jumping ability and range of motion), both groups showed similar improvements over the 72-hour period. This suggests that despite feeling more sore, vegan athletes’ muscles were recovering their strength and flexibility at the same rate as omnivores.
The dietary analysis revealed stark differences in protein intake. Vegans consumed 0.98 grams of protein per kilogram of body weight daily, while omnivores consumed 2.14 grams per kilogram. This means omnivores ate more than twice as much protein. Vegans also consumed significantly less branched-chain amino acids (specific building blocks of protein that are important for muscle recovery) and fewer essential amino acids overall. Despite these differences, muscle damage markers in the blood were comparable between groups, suggesting that muscle fiber damage itself was similar.
Previous research has shown that protein intake influences how muscles feel after exercise, though findings on actual muscle damage have been mixed. This study adds to that body of work by showing that low protein intake may affect soreness perception without necessarily changing the underlying muscle damage or functional recovery speed. The findings align with research suggesting that branched-chain amino acids may help reduce exercise-related soreness.
The study included only 14 people, which is a small sample size. Results from small studies can be due to chance and may not apply to all vegans and omnivores. The study was also short-term, looking only at recovery over 72 hours. We do not know if these patterns hold for longer-term training or in different types of exercise. Additionally, the vegan group was not intentionally eating low protein as part of the study design; they simply ate their normal diet, which happened to be lower in protein. This means we cannot be certain that protein itself caused the soreness difference, though it is the most likely explanation.
The Bottom Line
If you follow a vegan diet and do intense resistance training, consider increasing your protein intake to at least 1.6 to 2.0 grams per kilogram of body weight daily (higher than the vegans in this study). Focus on getting complete proteins or combining plant proteins to ensure you get all essential amino acids, particularly branched-chain amino acids. This may help reduce post-workout soreness. Confidence level: moderate, based on this small study and supporting research on protein and recovery.
This research is most relevant to vegans who do regular intense resistance training and experience significant muscle soreness. Omnivores eating adequate protein likely do not need to change their habits based on this study. Casual exercisers may not notice the soreness difference as much as serious athletes. People with muscle disorders or those taking certain medications should consult a healthcare provider before changing protein intake.
You might notice reduced soreness within 1 to 2 weeks of increasing protein intake, though some people may take 3 to 4 weeks to see a difference. Functional recovery (strength and flexibility) appears to happen at similar rates regardless of protein intake, so you should not expect faster recovery of exercise ability.
Frequently Asked Questions
Do vegans recover from workouts differently than meat-eaters?
Muscle damage markers are similar, but vegans may experience more soreness. A 2026 study found vegan athletes reported 2.7 points higher soreness at 24 hours post-exercise on a 10-point scale. Functional recovery (strength and flexibility) appeared comparable between groups.
Does protein intake affect muscle soreness after exercise?
Research suggests it may. Vegans in this study ate less than half the protein of omnivores and experienced significantly more soreness. Increasing protein intake, particularly branched-chain amino acids, may help reduce post-workout discomfort in vegan athletes.
How much protein should vegan athletes eat?
The study’s vegan participants consumed 0.98 grams per kilogram of body weight. Experts recommend vegan athletes aim for 1.6 to 2.0 grams per kilogram daily to optimize recovery and potentially reduce soreness after intense training.
Will eating more protein help me recover faster from workouts?
This study found that protein intake did not affect how quickly muscles regained strength or flexibility. However, higher protein may reduce soreness perception. Functional recovery speed appeared similar regardless of protein intake between groups.
What are branched-chain amino acids and why do they matter for recovery?
Branched-chain amino acids are three essential amino acids (leucine, isoleucine, and valine) that help build and repair muscle. Vegans in this study consumed significantly less of these, and research suggests they may help reduce exercise-induced soreness and support muscle recovery.
Want to Apply This Research?
- Log your daily protein intake in grams and track your post-workout soreness on a 1-10 scale at 24 and 48 hours after intense leg workouts. Record this weekly to identify patterns between protein intake and soreness levels.
- If you are vegan, set a daily protein target based on your body weight (aim for 1.6 to 2.0 grams per kilogram) and use the app to log protein sources at each meal. Add reminders to include branched-chain amino acid rich foods like legumes, nuts, seeds, and soy products around your workout days.
- Create a recovery dashboard that shows your weekly average protein intake alongside your average post-workout soreness scores. Compare these metrics month-to-month to see if increasing protein reduces soreness over time. Share trends with a coach or nutritionist for personalized guidance.
This research is preliminary and based on a small study of 14 participants. Results should not replace personalized medical or nutritional advice from a qualified healthcare provider or registered dietitian. If you experience severe or persistent muscle soreness, pain, or difficulty recovering from exercise, consult a healthcare professional. Individual responses to dietary changes vary, and this study does not establish that protein intake is the sole factor affecting soreness. Always consult with a healthcare provider before making significant changes to your diet or exercise routine, especially if you have underlying health conditions or take medications.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.