According to Gram Research analysis, people with Hashimoto’s thyroiditis experience significantly higher anxiety and depression, worse sleep quality, and lower overall quality of life compared to healthy people—even when their thyroid medication keeps hormone levels normal. A 2026 cross-sectional study of 226 people found that those with Hashimoto’s who engaged in high-intensity exercise had lower levels of thyroid antibodies, suggesting vigorous activity may help manage the autoimmune response.
A new study of 226 people found that those with Hashimoto’s thyroiditis—an autoimmune condition affecting the thyroid—experience more anxiety, depression, and sleep problems than people without the condition, even when their thyroid hormone levels are normal. Researchers also discovered that people with Hashimoto’s tend to exercise less intensely and eat differently than healthy people. Interestingly, those who did more high-intensity exercise had lower levels of thyroid antibodies, suggesting that vigorous activity might help manage the condition. These findings suggest that lifestyle changes, particularly exercise, could be an important part of managing Hashimoto’s beyond just taking thyroid medication.
Key Statistics
A 2026 cross-sectional study of 226 participants (105 with Hashimoto’s thyroiditis and 121 healthy controls) found that people with Hashimoto’s reported significantly higher anxiety and depression scores despite having normal thyroid hormone levels on medication.
Among 105 people with Hashimoto’s thyroiditis in a 2026 study, high-intensity exercise time was inversely associated with TPOAb (thyroid antibody) levels after adjusting for other factors, suggesting vigorous activity may help reduce the autoimmune response.
A 2026 study of 226 adults found that people with Hashimoto’s thyroiditis spent more time in low-intensity physical activity and less time in moderate-intensity exercise compared to 121 healthy controls, despite having normal thyroid hormone levels.
In a 2026 cross-sectional study of 105 Hashimoto’s patients with normal thyroid levels, sleep quality measured by the Pittsburgh Sleep Quality Index was substantially worse compared to 121 healthy controls, indicating sleep problems persist despite adequate medication.
The Quick Take
- What they studied: How lifestyle factors like mood, sleep, diet, and exercise differ between people with Hashimoto’s thyroiditis and people without the condition
- Who participated: 226 adults: 105 with Hashimoto’s thyroiditis and 121 healthy controls. All Hashimoto’s patients had normal thyroid hormone levels at the time of the study.
- Key finding: People with Hashimoto’s reported significantly higher anxiety and depression scores, worse sleep quality, and lower overall quality of life compared to healthy controls. Additionally, those who engaged in high-intensity exercise had lower levels of thyroid antibodies.
- What it means for you: If you have Hashimoto’s, you may benefit from paying attention to your mental health, sleep, and exercise habits—not just your medication. High-intensity exercise in particular appears to be associated with better immune control, though more research is needed to confirm this relationship.
The Research Details
Researchers conducted a single-center cross-sectional study, which means they took a snapshot of 226 people at one point in time and compared their lifestyle patterns. The study included 105 people diagnosed with Hashimoto’s thyroiditis and 121 healthy people as a comparison group. All participants with Hashimoto’s had normal thyroid hormone levels at the time of the study, meaning their medication was working well.
To measure psychological well-being, researchers used two standard questionnaires: the GAD-7 to assess anxiety and the PHQ-9 to measure depression. Sleep quality was evaluated using the Pittsburgh Sleep Quality Index, a widely-used tool that asks about sleep patterns and disturbances. Overall quality of life was measured with the SF-36 questionnaire. Dietary habits and physical activity were assessed using validated questionnaires, and blood tests measured thyroid antibody levels (TPOAb and TgAb).
The researchers then looked for connections between exercise patterns and thyroid antibody levels using statistical analysis, adjusting for other factors that might influence the results.
This research approach is important because it provides a comprehensive picture of how Hashimoto’s affects multiple areas of life simultaneously. By comparing people with Hashimoto’s to healthy controls, researchers could identify which lifestyle factors are actually different in this population. The measurement of thyroid antibodies alongside lifestyle factors is particularly valuable because it allows researchers to explore whether certain behaviors—like exercise—might influence the immune response in Hashimoto’s.
This study has several strengths: it used validated, standardized questionnaires that are recognized in medical research; it included a control group for comparison; and it measured actual blood markers (thyroid antibodies) rather than relying only on self-reported symptoms. However, because it’s a cross-sectional study, it captures only a single moment in time and cannot prove that lifestyle changes cause improvements in thyroid antibodies. The study was conducted at a single center, which may limit how well the findings apply to different populations. Additionally, the study cannot determine whether the lifestyle differences cause the Hashimoto’s symptoms or whether having Hashimoto’s causes people to change their lifestyle.
What the Results Show
People with Hashimoto’s thyroiditis reported significantly higher levels of anxiety and depression compared to healthy controls. Using standard measurement scales, Hashimoto’s patients scored higher on both the GAD-7 anxiety scale and the PHQ-9 depression scale. This was notable because all the Hashimoto’s patients in the study had normal thyroid hormone levels—meaning their medication was working—yet they still experienced more mood problems than the control group.
Sleep quality was also substantially worse in the Hashimoto’s group. When measured using the Pittsburgh Sleep Quality Index, people with Hashimoto’s reported more difficulty falling asleep, more nighttime awakenings, and overall poorer sleep quality. Overall quality of life, measured using the SF-36 questionnaire, was lower in the Hashimoto’s group across multiple dimensions.
Regarding physical activity, people with Hashimoto’s showed more conservative exercise patterns. They spent more time in low-intensity activities and less time in moderate-intensity exercise compared to healthy controls. However, an important finding emerged: among the Hashimoto’s patients, those who spent more time doing high-intensity exercise had lower levels of TPOAb (thyroid peroxidase antibodies), one of the key markers of the autoimmune response in Hashimoto’s. This relationship remained significant even after adjusting for other factors that might influence antibody levels.
The study also revealed distinct dietary patterns in people with Hashimoto’s. Compared to healthy controls, Hashimoto’s patients reported higher daily intake of meat, dairy products, vegetables, and fruits. Interestingly, they used iodized salt less frequently. These dietary differences suggest that people with Hashimoto’s may be making intentional adjustments to their diet, possibly based on information they’ve received about managing their condition, though the study didn’t explore the reasons behind these choices.
This research aligns with and expands upon previous findings showing that people with Hashimoto’s often experience persistent symptoms despite normal thyroid hormone levels. The study confirms what many patients report anecdotally—that mood, sleep, and quality of life remain problematic even when medication is optimized. The novel contribution of this research is the systematic documentation of these lifestyle patterns and the specific finding that high-intensity exercise correlates with lower thyroid antibody levels, which hasn’t been as thoroughly characterized in previous studies.
The study has several important limitations. First, because it’s cross-sectional (a snapshot in time), it cannot prove cause-and-effect relationships. For example, we cannot determine whether high-intensity exercise reduces thyroid antibodies or whether people with lower antibodies simply feel better and exercise more intensely. Second, the study was conducted at a single medical center, so the results may not apply equally to all populations or geographic regions. Third, the study relied on self-reported questionnaires for diet and exercise, which can be less accurate than objective measurements. Fourth, the study didn’t measure whether the Hashimoto’s patients were following any specific diets or exercise programs, so we don’t know if their lifestyle choices were intentional or coincidental. Finally, the study is observational and cannot account for all possible factors that might influence the results.
The Bottom Line
If you have Hashimoto’s thyroiditis, consider these evidence-based approaches: (1) Pay attention to your mental health—anxiety and depression are common even with normal thyroid levels, so screening and treatment may be beneficial (moderate confidence); (2) Prioritize sleep quality through good sleep habits (moderate confidence); (3) Engage in regular physical activity, with a focus on higher-intensity exercise when possible, as this appears associated with better immune control (moderate confidence, based on this single study). These recommendations should complement, not replace, your thyroid medication and regular medical care.
These findings are most relevant to people who have been diagnosed with Hashimoto’s thyroiditis, particularly those who feel unwell despite having normal thyroid hormone levels on medication. The findings may also interest healthcare providers who treat Hashimoto’s patients. People without Hashimoto’s should not assume these lifestyle recommendations apply to them in the same way. If you have Hashimoto’s, discuss these findings with your doctor before making major changes to your exercise routine or diet.
Improvements in mood and sleep may take several weeks to months of consistent lifestyle changes. The relationship between exercise and thyroid antibody levels is less clear in terms of timeline—the study shows an association but doesn’t indicate how quickly changes might occur. Most people should expect to see meaningful improvements in sleep and mood within 4-8 weeks of consistent lifestyle modifications, though individual results vary.
Frequently Asked Questions
Why do people with Hashimoto’s feel bad even when their thyroid levels are normal?
A 2026 study of 226 people found that Hashimoto’s patients with normal thyroid hormone levels still experienced higher anxiety, depression, and sleep problems compared to healthy people. This suggests the autoimmune condition affects mood and sleep through mechanisms beyond just thyroid hormone levels, possibly through ongoing immune system activity or inflammation.
Can exercise help manage Hashimoto’s thyroiditis?
Research shows an association: a 2026 study of 105 Hashimoto’s patients found that those doing high-intensity exercise had lower thyroid antibody levels. However, this doesn’t prove exercise causes the improvement. Talk to your doctor about appropriate exercise for your situation, as individual needs vary.
What lifestyle changes should I make if I have Hashimoto’s?
A 2026 study suggests focusing on three areas: mental health screening (anxiety and depression are common), sleep quality improvement, and regular physical activity with higher-intensity exercise when possible. These changes should complement your thyroid medication, not replace it. Discuss specific changes with your healthcare provider.
Do people with Hashimoto’s eat differently than healthy people?
A 2026 study of 226 people found that Hashimoto’s patients reported higher intake of meat, dairy, vegetables, and fruits, and used iodized salt less frequently. However, the study didn’t explain why these differences exist or whether they help manage the condition.
Is Hashimoto’s thyroiditis just a thyroid problem?
No. A 2026 study of 226 people found that Hashimoto’s affects multiple areas of life—mood, sleep, quality of life, and exercise patterns—even when thyroid medication keeps hormone levels normal. This suggests it’s an autoimmune condition with broader health impacts beyond just thyroid function.
Want to Apply This Research?
- Track weekly exercise intensity distribution: record the number of minutes spent in low-intensity, moderate-intensity, and high-intensity activity each week. Also track sleep quality using a simple 1-10 scale and mood using a brief daily anxiety/depression check-in (0-10 scale). Monitor these metrics weekly to identify patterns.
- Set a specific goal to gradually increase high-intensity exercise time by 10-15 minutes per week. Use the app to schedule exercise sessions and send reminders. Simultaneously, implement one sleep hygiene improvement (such as a consistent bedtime) and track its impact on your mood and energy levels.
- Create a dashboard showing 4-week rolling averages of exercise intensity distribution, sleep quality scores, and mood ratings. Set monthly check-in points to review whether increased high-intensity exercise correlates with improved mood and sleep. Share this data with your healthcare provider during regular appointments to inform discussions about your overall Hashimoto’s management.
This article summarizes research findings and is for educational purposes only. It does not constitute medical advice. People with Hashimoto’s thyroiditis should continue taking prescribed thyroid medication as directed by their healthcare provider. Before making significant changes to exercise routines, diet, or mental health treatment, consult with your doctor or endocrinologist. The findings presented are from a single cross-sectional study and should not be interpreted as definitive treatment recommendations. Individual responses to lifestyle modifications vary, and what works for one person may not work for another.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.