Question

which of the following is not a method of calculating percentage of body fat?
○ bioelectrical impedance
○ skinfold measures
○ underwater weighing
○ body mass index

Explanation:

• Bioelectrical Impedance: A method to estimate body fat by measuring how the body resists a small electrical current, related to body composition (including fat percentage).
• Skinfold measures: Involve measuring skinfold thickness at various sites to estimate body fat percentage, a common anthropometric method.
• Underwater weighing: A classic method to determine body density (and then estimate fat percentage) by comparing weight in air and underwater.
• Body mass index (BMI): Calculated as weight (kg) divided by height (m) squared. It assesses weight status relative to height (e.g., underweight, normal, overweight, obese) but does not directly measure or calculate body fat percentage. It is a proxy for body fatness but not a method to determine the percentage of body fat.

Answer:

D. Body mass index