In young, healthy men, having a higher body mass index is linked to higher heart output and stroke volume, while a larger waist-to-hip ratio is linked to lower heart output and stroke volume. This...

In young, healthy men, a higher body mass index means the heart contributes more to blood pressure increases during stress, while a larger waist-to-hip ratio means less contribution. This finding is from the abstract summary - full study details were not available

Measuring your waist compared to your height, your weight relative to your height, or just your waist size can all tell you something about your risk for heart problems—even if you don’t have diabetes or high blood pressure.