ACE Health Coach Certification Practice Test

What is Christina's predicted weight if she successfully reduces her body fat to 23%?

1. 138 lb

2. 148 lb

3. 158 lb

4. 168 lb

The correct answer is: 158 lb

To determine Christina's predicted weight if she reduces her body fat to 23%, it is important to understand how body fat percentage relates to overall weight. The calculation typically begins by identifying her current weight and body composition. Assuming Christina's current weight is known and her current body fat percentage is above 23%, we can calculate her lean body mass (the weight of everything in her body except fat). This is done by using her current body fat percentage to find out how much weight is attributed to fat and then subtracting that from her total weight. Once we have her lean body mass, we can predict her new weight using the target body fat percentage. In this case, if Christina retains her lean body mass but decreases her body fat to 23%, we can set up the following equation: Let’s say Christina's lean body mass is represented as L. Her new weight (W) would then consist of her lean mass plus the fat mass calculated from the new body fat percentage of 23%. This can be expressed as: W = L / (1 - 0.23) This calculation reveals that the weight at which her body fat percentage reaches 23% can be computed by accurately assessing her body fat and lean mass. Thus, if