Final answer:
The NHLBI treatment algorithm does not explicitly state how often someone with a healthy BMI range should check their BMI, but an annual check as part of a general health assessment is generally recommended.
Step-by-step explanation:
Regarding the frequency of checking Body Mass Index (BMI) for someone with a BMI in the healthy range, the National Heart, Lung, and Blood Institute (NHLBI) does not explicitly provide a specific timeline in their treatment algorithm for individuals with a normal BMI. However, it is generally recommended that adults have their BMI calculated at least annually as part of their routine health assessment. BMI is a relative measure of body weight compared to overall height, where a BMI ranging from 18-24.9 is considered normal weight. It serves as an indicator of health risks associated with body weight. Therefore, keeping track of BMI can help individuals maintain a healthy weight and potentially preempt health issues.