Understanding BMI
Body Mass Index (BMI) is a simple measure using height and weight to estimate body fat. While it's a useful screening tool, it doesn't directly measure body fat and may not be accurate for athletes, elderly, or pregnant women.
BMI Formula
Metric
BMI = weight (kg) / height (m)²
Imperial
BMI = (weight (lbs) / height (in)²) × 703
Limitations of BMI
- Doesn't distinguish between muscle and fat mass
- May overestimate body fat in athletes
- May underestimate body fat in elderly
- Doesn't account for fat distribution
FAQ
What is a healthy BMI?
A BMI between 18.5 and 24.9 is generally considered healthy, but optimal health depends on many factors beyond BMI.
Should athletes use BMI?
BMI may not be accurate for athletes since muscle weighs more than fat. Consider body fat percentage measurements instead.