Higher muscle fat, not body weight, linked to increased heart disease risk, study finds.

A study from Brigham and Women's Hospital shows that hidden fat in muscles increases the risk of heart attacks and heart failure, regardless of body weight. The research, published in the European Heart Journal, analyzed 669 patients without obstructive coronary artery disease and found that higher amounts of muscle fat were linked to damage in tiny heart blood vessels and a higher risk of heart disease. This suggests that BMI alone may not fully assess heart health risks.