Integrative multi-step: Use the female EER equation provided below to calculate EER for a 40-year-old woman, 1.65 m tall, 68 kg, with 'low active' PA = 1.12. Then explain how you would use a 6-week weight log to determine whether this EER over- or under-estimates her true energy needs. (Female equation: EER = 354 − (6.91 × age) + PA × (9.36 × weight_kg + 726 × height_m)).

• A. EER ≈ 1,500 kcal/day; refinement is unnecessary because formulas are precise and do not require weight monitoring.
• B. EER ≈ 2,132 kcal/day; refine by monitoring 6-week weight trend—stable weight confirms estimate, sustained gain suggests underestimation, sustained loss suggests overestimation.
• C. EER cannot be calculated for females; recommend following the male equation and doubling the result to adjust for sex differences.
• D. EER ≈ 3,500 kcal/day; use immediate 2-week weight changes only to refine the estimate because longer periods are biased by lifestyle changes.

Answer: (B)