Doctors usually recommend healthy eating, exercise, and medications to lower the risk of heart disease. But growing research now suggests that emotional well-being may also have a powerful effect on the heart.
A new study led by researchers at the University of Illinois Urbana-Champaign has found that positive psychology programs such as mindfulness exercises, gratitude journaling, and optimism training may improve blood pressure, inflammation, and other important heart disease risk factors within just a few weeks.
The findings were published in the journal Cardiology Clinics.
Heart disease is currently the leading cause of death worldwide. Conditions such as high blood pressure, heart attacks, heart failure, and stroke affect millions of people every year. Traditional risk factors include smoking, obesity, diabetes, poor diet, inactivity, and stress.
In recent years, however, scientists have started paying closer attention to the relationship between mental health and cardiovascular health. Researchers have found that long-term stress, anxiety, depression, and loneliness may place additional strain on the heart and blood vessels.
Positive psychology takes a different approach by focusing on building positive emotions and healthy thought patterns instead of only treating emotional problems.
Programs in positive psychology may include mindfulness meditation, gratitude writing exercises, optimism training, motivational interviewing, and spirituality-based activities. The goal is to help people develop healthier emotional habits that support both mental and physical well-being.
The new study reviewed 18 randomized controlled trials involving adults with elevated cardiovascular risk factors. Many participants had uncontrolled high blood pressure, heart failure, or other heart-related conditions.
Most participants were in their late 50s to mid-60s. The programs lasted between six and 12 weeks and often included weekly sessions combined with daily home practice.
Researchers found that mindfulness-based programs delivered over eight weeks consistently lowered systolic blood pressure. Some programs also reduced inflammatory markers linked to cardiovascular disease.
Inflammation plays an important role in heart disease because it can damage blood vessels and contribute to plaque buildup inside arteries.
One of the strongest results came from a 12-week digital spirituality-based program. Participants experienced a reduction of 7.6 points in systolic blood pressure measured with a regular blood pressure cuff. Central systolic pressure measured near the heart also improved.
Researchers tested many different delivery methods during the studies. Some programs used face-to-face group sessions, while others used apps, phone calls, text messaging, journaling activities, virtual meetings, or combinations of several approaches.
Interestingly, programs with more frequent contact produced stronger results. Daily practice combined with regular weekly reinforcement appeared to provide the most reliable improvements.
One program delivered through WhatsApp achieved particularly strong lifestyle changes. Participants completed small daily tasks and attended weekly sessions that encouraged healthier eating, increased physical activity, and better medication use.
Another program using motivational interviewing increased participants’ physical activity by approximately 1,800 additional steps per day.
Researchers believe these programs may improve cardiovascular health partly because they help people develop healthier habits. When individuals feel more hopeful, motivated, and emotionally balanced, they may become more willing to exercise, eat healthier foods, and follow medical advice consistently.
Mindfulness may also help reduce stress hormones that can increase blood pressure and inflammation over time.
Rosalba Hernandez, who led the study, explained that repeated practice appears important. According to the researchers, daily exercises reinforced by weekly sessions over eight to 12 weeks produced the most consistent benefits.
However, researchers also noted that maintaining lifestyle changes may require ongoing support after the initial program ends. Without reinforcement, some healthy behaviors may fade over time.
The findings add to a growing body of evidence suggesting that emotional well-being and physical health are deeply connected. Earlier studies have already shown that optimistic people tend to have better cardiovascular health outcomes.
The researchers believe healthcare systems should pay more attention to mental and behavioral health as part of heart disease prevention and treatment.
The study also highlights the increasing role of digital health tools. Apps, messaging platforms, and virtual programs may allow more people to access emotional support and healthy lifestyle coaching at lower cost.
After carefully analyzing the findings, the study appears valuable because it reviewed multiple randomized controlled trials, which are among the strongest forms of scientific evidence.
The results consistently suggest that positive psychology and mindfulness interventions may help improve important cardiovascular risk factors. However, the improvements may be partly driven by healthier lifestyle behaviors rather than psychological effects alone.
In addition, most studies lasted only a few weeks or months, so researchers still need more long-term evidence to understand whether the benefits remain over many years. Even so, the findings strongly support the idea that caring for mental and emotional health may also help protect the heart.
If you care about heart health, please read studies about how vitamin D influences cholesterol levels, and what we know about egg intake and heart disease.
For more health information, please see recent studies about best supplements for heart disease prevention, and wild blueberries can benefit your heart and brain.
Source: University of Illinois Urbana-Champaign.
