Researchers studied 201 young adults with heart conditions present from birth to understand how their beliefs about health influence their actual heart risk. They found that people who believe they can control their own health tend to make better choices like eating healthier and exercising, which lowers their heart disease risk. On the other hand, people who think health is mostly about luck or chance tend to make riskier choices. The study shows that healthy habits are the bridge between what people believe and their actual heart health—meaning that building better daily habits might be one of the most important ways to protect your heart.
The Quick Take
- What they studied: Whether healthy daily habits explain why some young adults with heart conditions have better heart health than others, based on what they believe about controlling their own health
- Who participated: 201 young adults between ages 18-31 who were born with heart defects. About half were overweight or obese, and three-quarters had unhealthy eating habits
- Key finding: Young adults who believe they can control their health through their own actions had significantly lower heart disease risk, and this was mainly because they made healthier choices. Those who believe health is mostly about luck had higher risk. Healthy habits were the key reason for these differences
- What it means for you: If you have a heart condition, focusing on building better daily habits—especially eating well and getting regular health checkups—may be more powerful than you realize. These habits can help protect your heart, regardless of your genetics. However, this study shows connection, not proof of cause-and-effect, so talk to your doctor about your specific situation
The Research Details
Researchers recruited 201 young adults with congenital heart disease (heart problems from birth) and measured three things: their beliefs about health control, their actual daily health habits, and their current heart disease risk. They used standardized questionnaires to measure beliefs about whether people think they control their health, whether doctors control it, or whether it’s just luck. They measured health habits like diet quality, exercise, preventive care visits, and stress management. They calculated heart disease risk using a special scoring system that looks at multiple risk factors together.
The researchers then used advanced statistical methods to figure out whether health habits were the reason that certain beliefs led to better or worse heart health. This is like finding the chain of events: belief → habits → heart health. They used a technique called mediation analysis, which is specifically designed to understand these kinds of connections.
Understanding how beliefs influence health outcomes is important because it shows us where to focus efforts. If healthy habits are the main reason why certain beliefs lead to better heart health, then helping people develop better habits might be more effective than just telling them what to do. This approach respects that people have different beliefs but shows that actions matter more than beliefs alone
This study was published in Scientific Reports, a reputable peer-reviewed journal. The researchers used validated, established questionnaires rather than making up their own measures, which increases reliability. The sample size of 201 is reasonable for this type of study. However, this was a snapshot study (cross-sectional), meaning they measured everything at one point in time, so we can’t prove that beliefs actually cause habit changes—only that they’re connected. The study focused on young adults with heart conditions, so results may not apply to everyone
What the Results Show
The study found that young adults who believe they can control their own health (called ‘internal locus of control’) had significantly lower heart disease risk scores. This protective effect was almost entirely explained by their healthier daily habits—they ate better, exercised more, and kept up with preventive doctor visits.
In contrast, young adults who believe their health is mostly determined by chance or luck (called ‘chance locus of control’) had higher heart disease risk. This was partly because they made less healthy choices, but other factors also played a role.
Interestingly, young adults who believe that doctors or other powerful people control their health didn’t show a clear pattern. Their health habits sometimes helped and sometimes didn’t in unexpected ways, suggesting this belief system works differently than the other two.
The most important health habits that explained the connection between beliefs and heart risk were eating habits and preventive health practices like regular checkups. Mental attitude and stress management didn’t explain the connection as much as researchers expected.
When researchers looked at specific health behaviors separately, they found that diet quality and preventive health practices (like getting regular checkups and screenings) were the strongest links between beliefs and heart risk. This suggests these two areas might be the best targets for improvement. The study also found that 76.6% of participants had unhealthy eating habits and 50.25% were overweight or obese, showing these are major challenges for this population
Previous research has shown that beliefs about health control matter for health outcomes, but this study adds important detail by showing exactly how—through daily habits. This fits with other research suggesting that what people do day-to-day is more important than their circumstances or genetics alone. The finding that diet and preventive care are key pathways aligns with general cardiovascular health research
This study measured everything at one point in time, so we can’t prove that beliefs actually cause people to change their habits—only that they’re connected. The study only included young adults with congenital heart disease, so results may not apply to people with other types of heart disease or healthy people. The researchers couldn’t measure all possible factors that might influence heart health. Some of the statistical relationships were small, meaning they’re real but not huge in practical terms
The Bottom Line
If you have a congenital heart condition: (1) Focus on building healthy eating habits—this appears to be one of the most powerful things you can control; (2) Keep up with regular preventive health checkups and screenings; (3) Consider whether your beliefs about health might be holding you back, and work with your healthcare team to develop a sense of control over your health. Confidence level: Moderate—this study shows connection but not definitive proof
Young adults with congenital heart disease should especially pay attention to these findings. People with other types of heart disease may benefit from similar approaches, but this study specifically tested young adults with heart defects from birth. If you’re healthy, these findings suggest that developing healthy habits and a sense of control over your health is still valuable, but the specific risks may be different
Building new habits typically takes 2-3 months to feel automatic, but heart health improvements may take longer. You might notice improved energy and mood within weeks, but measurable improvements in heart disease risk factors like cholesterol or blood pressure usually take 3-6 months of consistent healthy habits
Want to Apply This Research?
- Track daily dietary choices (meals logged or photos) and preventive health activities (doctor visits, medication adherence, exercise minutes). Aim for at least 5 days per week of healthy eating and monthly preventive health actions
- Set a specific goal like ‘I will eat one home-cooked meal with vegetables daily’ or ‘I will schedule and attend my quarterly heart checkup.’ Use the app to set reminders for both meal planning and health appointments, and track completion with simple yes/no checkmarks
- Review weekly habit completion rates and monthly trends. Connect with your healthcare provider every 3 months to discuss progress and adjust goals. Use the app to identify which habits are easiest and hardest for you, then focus on building the easiest ones first to build momentum
This research shows a connection between health beliefs, daily habits, and heart disease risk in young adults with congenital heart disease, but it does not prove that changing beliefs or habits will definitely reduce your heart risk. Individual results vary based on many factors including genetics, medications, and specific heart condition severity. This information is educational and should not replace personalized medical advice from your cardiologist or healthcare provider. Before making significant changes to diet, exercise, or health routines, especially if you have a heart condition, consult with your medical team to ensure recommendations are safe and appropriate for your specific situation
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.