AFAA Personal Trainer Certification Practice Exam

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What formula is used to calculate protein needs in kilograms?

Body weight x 0.45
Body weight x 1.2
Body weight x 0.8
Body weight x 2.0

The correct answer is: Body weight x 0.8

The formula to calculate protein needs, which uses body weight in kilograms, is based on the recommended dietary allowance (RDA) for protein intake. The RDA suggests that adults should consume about 0.8 grams of protein per kilogram of body weight for general health and maintenance of muscle mass. This means that by multiplying body weight by 0.8, you can determine the minimum daily protein requirement in grams for an individual. This value is particularly useful for the average, healthy adult and serves as a guideline for maintaining adequate protein levels in the diet. Factors such as age, sex, physical activity level, and specific dietary needs may lead individuals to adjust their protein intake, but the 0.8 grams per kilogram offers a foundational understanding of protein requirements. Ultimately, this standard is widely accepted in nutrition science, making it the correct choice for calculating protein needs.