BMI, if properly integrated into a user profile, should go beyond providing a numerical value, becoming an intelligent tool for personalizing fitness content. In an app that offers content related to training and wellness, BMI can be used as a link between the user and the content offered. Each fitness program, article, or video can be associated with a specific BMI range, making the experience more consistent and targeted. For example, a user with a BMI of 25 or higher could automatically view content aimed at weight loss, progressive cardio, or low-impact workouts, while a user with a normal BMI would receive suggestions for maintaining, toning, or improving performance. This way, the content is not generic, but contextualized to the user's actual condition. This logic allows for a more seamless and personalized experience: the user doesn't have to choose what's best for them; the app itself guides them based on the data already present in their profile. BMI thus ceases to be a single number and becomes a key to accessing content. As BMI changes over time, the suggested content can also evolve, guiding the user on a progressive and consistent journey. This strengthens motivation, increases engagement, and enhances the app's perceived value. In this scenario, BMI is no longer a simple calculator, but a personalization engine that intelligently and seamlessly connects data, goals, and fitness content.