What is BMI and why can it be misleading for athletes?

• A. Body Mass Index; it does not distinguish fat from lean mass and may misclassify muscular individuals
• B. Body Mass Index; it measures body fat percentage directly
• C. Body Mass Index; it measures hydration status
• D. Body Mass Index; it assesses bone mineral density

Answer: (B)

BMI stands for Body Mass Index. It’s a height-to-weight ratio used to categorize weight status, but it doesn’t distinguish fat from lean mass. For athletes with high muscle mass, that muscle adds weight and can raise BMI, even though their body fat is low and fitness is high. So BMI can misclassify muscular individuals as overweight or obese, which makes it a poor sole measure of health or body composition for athletes. It also doesn’t measure body fat percentage directly, hydration status, or bone density, so it’s a blunt tool for assessing athletic populations.