A new study suggests that where you carry weight matters more than how much you weigh overall. Researchers found that waist circumference and waist-to-height ratio were better predictors of heart failure risk than body mass index (BMI), a measurement that divides weight by height squared. The findings highlight the importance of central obesity, or excess fat stored around the belly area, in cardiovascular health. Why Is Belly Fat More Dangerous Than Other Body Fat? The study examined nearly 2,000 adults from the Jackson Heart Study who did not have heart failure at the start of the research. Over a median follow-up period of just under seven years, researchers tracked several body composition measurements, including weight, BMI, waist circumference, and waist-to-height ratio. The key finding was striking: while BMI did not predict heart failure risk, both waist circumference and waist-to-height ratio were significantly associated with developing the condition. The difference comes down to the type of fat. Belly fat is primarily visceral fat, which is deep fat that surrounds your organs rather than sitting just under the skin. This visceral fat appears to trigger more inflammation in the body, which is a major driver of heart disease. When researchers measured high-sensitivity C-reactive protein, a marker of systemic inflammation, they found that people with elevated levels had significantly lower heart failure-free survival rates. "Measures of central obesity, such as waist circumference and waist-to-height ratio, were associated with a higher risk of developing heart failure over time, whereas body mass index itself was not significantly associated with heart failure risk in our analysis," explained Szu-Han Chen, a researcher at the School of Medicine at National Yang Ming Chiao Tung University. Szu-Han Chen, School of Medicine, National Yang Ming Chiao Tung University How Does Inflammation Connect Belly Fat to Heart Failure? The research team performed a mediation analysis to understand how inflammation might explain the link between belly fat and heart failure. The results were revealing: inflammation accounted for approximately 25.4% of the waist circumference effect and 28.5% of the waist-to-height ratio effect on heart failure risk. In other words, about one-quarter to one-third of the increased heart failure risk from belly fat appears to be driven by inflammation. This finding suggests that visceral fat doesn't just add weight; it actively produces inflammatory substances that damage the cardiovascular system. Kevin Shah, a board-certified cardiologist and Program Director of Heart Failure Outreach at MemorialCare Heart & Vascular Institute, noted that while the study population was limited to African-American adults, the biological mechanisms linking visceral fat, inflammation, and cardiovascular disease are well established across many populations. How to Reduce Belly Fat and Lower Inflammation If you're concerned about central obesity and heart health, experts recommend a multi-pronged approach focused on improving overall metabolic health: - Regular Physical Activity: Combine aerobic exercise with resistance training to reduce visceral fat and systemic inflammation more effectively than either type alone. - Dietary Changes: Focus on whole foods, fiber, fruits, vegetables, and healthy fats while reducing excess sugar and ultra-processed foods that promote inflammation. - Sleep Quality: Prioritize consistent, quality sleep, as poor sleep is linked to increased visceral fat accumulation and inflammation. "The most effective strategies focus on improving overall metabolic health. Regular physical activity, particularly a combination of aerobic exercise and resistance training, maintaining a diet rich in whole foods, fiber, fruits, vegetables, and healthy fats, improving sleep quality, and reducing excess sugar and ultra-processed foods can all help reduce visceral fat and systemic inflammation," said Kevin Shah, M.D. Kevin Shah, M.D., Program Director of Heart Failure Outreach, MemorialCare Heart & Vascular Institute The practical takeaway from this research is that clinicians and patients should pay closer attention to where fat is distributed in the body, not just overall weight. If you have a larger waist circumference relative to your height, that may be a stronger signal to take action on cardiovascular health than your BMI alone would suggest. The good news is that visceral fat is often the first type of fat lost when people increase physical activity and improve their diet, making it a responsive target for intervention. While this study was presented at the American Heart Association's EPI|Lifestyle Scientific Sessions 2026 and has not yet been published in a peer-reviewed journal, the findings align with existing research on the dangers of central obesity. As always, consult with your doctor before making significant changes to your exercise routine or diet, especially if you have existing heart concerns.
