Question

maintaining a healthy body composition and body image
instruction active
analyzing bmi as a screening tool
why is bmi an imperfect tool for measuring body composition? check all that apply.
□ it does not take into account a persons height.
□ it does not take into account level of fitness.
□ it is not able to indicate disease risk.
□ it may underestimate body fat in some individuals.
□ it does not include a measurement of body weight.

Explanation:

• BMI formula is $\text{BMI}=\frac{\text{weight (kg)}}{\text{height}^2(\text{m}^2)}$, so it does take height and weight into account. So options "It does not take into account a person's height" and "It does not include a measurement of body weight" are wrong.
• BMI is just a ratio of weight to height. It cannot tell about a person's fitness level (e.g., muscle - fat ratio which affects fitness but not directly captured by BMI).
• BMI alone cannot precisely indicate disease risk as other factors like blood lipid levels, blood sugar levels (not captured by BMI) also play a role.
• For muscular individuals, since muscle is denser than fat, a muscular person may have a higher weight (due to muscle) but a lower body - fat percentage. So BMI may underestimate body fat in such cases.

Answer:

It does not take into account level of fitness.
It is not able to indicate disease risk.
It may underestimate body fat in some individuals.