Final answer:
The BIA method will likely underestimate the body fat percentage if a client is dehydrated.
Step-by-step explanation:
The statement is true. BIA method, also known as Bioelectrical Impedance Analysis, is commonly used to estimate body composition, including body fat percentage. However, dehydration can affect the accuracy of this method. When a client is dehydrated, the electrical conductivity of the body decreases, which may lead to an underestimation of body fat percentage by the BIA method.
For example, if a person is dehydrated, their body water content will be reduced, and this can cause the BIA method to interpret their body as having a higher percentage of fat due to the lower electrical conductivity.