Researchers studied 182 adults who were experiencing emotional stress to see if following healthy lifestyle guidelines could improve their mental health. They looked at what people ate, how much they exercised, and how much alcohol they drank. The results showed that people who followed national health recommendations for diet and physical activity had lower rates of depression and anxiety. Eating more whole foods and exercising regularly appeared to be especially helpful, while eating lots of processed foods was linked to higher depression and anxiety risk. This suggests that doctors might recommend lifestyle changes as part of treating mental health problems.
The Quick Take
- What they studied: Whether following Australian government health guidelines about eating, exercise, and alcohol use could help reduce depression and anxiety in people experiencing emotional distress
- Who participated: 182 adults who were dealing with psychological stress or emotional difficulties. Participants came from a larger study comparing two types of mental health treatment approaches
- Key finding: People who exercised regularly had about half the risk of depression and anxiety compared to those who didn’t exercise. Those who ate better quality food and limited alcohol also showed lower depression and anxiety risk, while eating ultra-processed foods was linked to higher risk
- What it means for you: If you’re struggling with depression or anxiety, making changes to eat healthier foods, exercise more, and drink less alcohol may help improve your mood and mental health. However, these lifestyle changes work best alongside professional mental health treatment, not as a replacement for it
The Research Details
This study used data from a larger research project called the CALM trial that tested two different ways to help people with mental health problems. Instead of starting a brand new study, the researchers looked back at information already collected from 182 participants. They examined how closely each person followed Australian government health guidelines for eating, physical activity, alcohol use, and smoking. Then they looked at whether people who followed these guidelines more closely had better mental health outcomes like lower depression and anxiety.
The researchers measured diet quality by looking at what foods people ate, physical activity by tracking exercise levels, and alcohol consumption by asking about drinking habits. They used statistical methods to figure out the relationship between following these guidelines and mental health improvements.
This approach is called a secondary analysis because the researchers used data collected for a different original purpose. It’s a practical way to answer new questions without needing to recruit new participants or spend extra time and money.
This research approach is important because it shows real-world connections between lifestyle choices and mental health in people who were actually experiencing emotional distress, not just healthy volunteers. By looking at actual behavior and actual mental health outcomes together, researchers can understand whether lifestyle changes might really help people struggling with depression and anxiety. This type of evidence helps doctors decide what advice to give their patients.
This study has several strengths: it included real people dealing with actual mental health challenges, it measured multiple lifestyle factors together, and it used data from a structured research trial with careful record-keeping. However, readers should know that this was a secondary analysis, meaning the original study wasn’t specifically designed to answer these questions. The sample size of 182 people is moderate, which is reasonable but not huge. The study was done in Australia, so results may apply most directly to people in similar countries with similar food systems and healthcare. The researchers couldn’t randomly assign people to different lifestyle groups, so we can’t be completely certain that lifestyle changes directly cause better mental health—other factors could be involved.
What the Results Show
The most striking finding was about physical activity: people who exercised regularly had about 49% lower risk of depression and anxiety compared to those who didn’t exercise regularly. This was the strongest effect the researchers found. People who ate higher quality diets—meaning more whole foods like fruits, vegetables, and whole grains—had about 7% lower risk of depression and anxiety. Those who limited their alcohol consumption had about 41% lower risk.
On the flip side, eating more ultra-processed foods (like packaged snacks, sugary drinks, and fast food) was linked to higher depression and anxiety risk. The researchers also looked at smoking but found less clear connections to mental health outcomes in this group.
These findings suggest that physical activity might be especially important for mental health, but that eating well and limiting alcohol also play meaningful roles. The good news is that these are all behaviors people can change and control.
Beyond the main findings, the research suggests that combining multiple healthy behaviors—eating well, exercising, and limiting alcohol—might work better together than any single change alone. The study also showed that following national health guidelines, which are based on scientific evidence about what’s healthy, appears to have real mental health benefits. This supports the idea that the guidelines aren’t just about physical health but also about emotional and mental wellbeing.
This research fits with what scientists have been finding for years: that lifestyle choices affect mental health. Many previous studies have shown that exercise helps with depression and anxiety, and that diet quality matters for brain health. What’s newer here is showing that following official national guidelines specifically—rather than just making random healthy changes—appears to provide mental health benefits. This helps doctors and patients understand that the guidelines they hear about aren’t just rules, but are actually connected to feeling better emotionally.
This study has important limitations to understand. First, it was a secondary analysis, meaning the original study wasn’t designed specifically to answer these questions, so some important information might be missing. Second, the researchers couldn’t randomly assign people to different lifestyle groups, so we can’t be completely sure that lifestyle changes directly cause better mental health—it’s possible that people who feel better emotionally are more motivated to exercise and eat well, rather than the other way around. Third, the study only included 182 people, which is a moderate size. Fourth, all participants were experiencing some level of emotional distress, so results might not apply to everyone. Finally, the study was done in Australia, so the specific foods and exercise options available might be different in other countries.
The Bottom Line
If you’re experiencing depression or anxiety, consider making these changes: aim for at least 150 minutes of moderate exercise per week (like brisk walking), eat more whole foods like fruits, vegetables, whole grains, and lean proteins while reducing ultra-processed foods, and limit alcohol consumption. These changes appear to have moderate to strong benefits for mental health based on this research. However, these lifestyle changes should be used alongside professional mental health treatment like therapy or counseling, not instead of it. Talk to your doctor or mental health professional before making major changes, especially if you’re taking medications.
These findings are most relevant for adults experiencing depression, anxiety, or other emotional distress who want to add lifestyle changes to their mental health treatment. They’re also useful for anyone interested in preventing depression and anxiety. These recommendations are probably most applicable to people living in developed countries with similar food systems to Australia. People with certain medical conditions, eating disorders, or those taking specific medications should talk to their doctor before making major lifestyle changes.
You probably won’t feel dramatically better overnight. Most people notice mood improvements from exercise within 2-4 weeks of regular activity. Dietary changes may take 4-8 weeks to show mental health benefits. The most important thing is consistency—making these changes regularly over weeks and months, not just trying them once. Mental health improvement is usually gradual, and combining lifestyle changes with professional treatment typically works better than either approach alone.
Want to Apply This Research?
- Track three specific behaviors daily: (1) minutes of physical activity, aiming for 20-30 minutes most days, (2) servings of whole foods (fruits, vegetables, whole grains) eaten, aiming for 5+ servings daily, and (3) alcoholic drinks consumed, aiming for zero or minimal. Also track mood on a simple 1-10 scale each evening to see if you notice patterns between your behaviors and how you feel.
- Start with one small change: commit to a 20-minute walk three times this week, or swap one processed snack for fruit or nuts daily. Use the app to log this one behavior and celebrate when you complete it. Once this feels routine (usually 2-3 weeks), add a second change like reducing alcohol or adding more vegetables to meals. Building gradually is more sustainable than trying to change everything at once.
- Set up weekly check-ins where you review your app data every Sunday evening. Look at patterns: Did weeks when you exercised more show better mood scores? Did days with more whole foods correlate with lower anxiety? After 4-8 weeks, review your overall trends. If you’re not seeing improvement in mood alongside lifestyle changes, talk to a mental health professional—lifestyle changes work best combined with professional treatment.
This research suggests associations between lifestyle choices and mental health outcomes, but it is not a substitute for professional mental health treatment. If you are experiencing depression, anxiety, or other mental health concerns, please consult with a qualified healthcare provider, therapist, or counselor. Lifestyle changes should be made in consultation with your healthcare team, especially if you are taking medications or have existing health conditions. This study was conducted in Australia and findings may vary based on individual circumstances, cultural context, and available resources. Always seek professional medical advice before making significant changes to your diet, exercise routine, or alcohol consumption, particularly if you have a history of eating disorders or substance use.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.