About: The BMI has been criticized for being an inappropriate measure for very muscular individuals who are in excellent physical condition, and also being inappropriate in some ethnic groups of differing heights and stature.

Advice: Overweight (BMI > 25) and obese (BMI > 30) individuals should focus on proper diet and regular exercise. Body Surface Area (BSA) is often preferred over body weight in clinical use because it better reflects metabolic mass, which is mainly determined by fat-free body mass. BSA is widely used in medical settings such as assessing heart performance and calculating chemotherapy dosages. Although BSA has limitations—especially at extreme heights or weights—it generally provides more consistent clinical results than body weight alone.