What body composition measurement methods are approved by the Navy for the PFA?

The correct answer emphasizes the methods that the Navy specifically recognizes for assessing body composition during the Physical Fitness Assessment (PFA). The Navy has validated waist circumference measurement as a reliable way to estimate body fat and identify individuals at risk for obesity-related health issues. Alongside this, body fat percentage measurement—typically assessed through methods like hydrostatic weighing or bioelectrical impedance, though bioelectrical impedance alone is not solely included in the Navy’s approved methods—provides a more accurate representation of body composition than weight or dimensions alone.

Both waist circumference and body fat percentage measurements are aligned with the Navy’s objectives to maintain operational readiness and address overall health among service members. By focusing on these two metrics, the Navy aims to promote a healthier body composition standard that aligns better with functional fitness and reduced risk of injury compared to relying strictly on weight or body mass index.

The other answer choices include measurement methods that may not be consistently recognized or emphasized by the Navy, which can lead to less accurate assessments of health and readiness.