Final answer:
The best part of the body to measure for heart health is the waist circumference. It is recommended to measure the waist circumference just above the belly button and take into account the waist-to-hip ratio for a more comprehensive assessment.
Step-by-step explanation:
The best part of the body to measure in order to assess heart health is the waist circumference. This measurement is taken just above the belly button. Men with a waist circumference greater than 40 inches and women with a waist circumference greater than 35 inches are predicted to face greater health risks. The waist-to-hip ratio is also considered a better measurement than waist circumference alone in predicting disease risk.