Which of the following is NOT a common goal in sports nutrition?

In the context of sports nutrition, the primary focus is on optimizing an athlete's performance, recovery, and body composition to support their training and competitive efforts. Goals such as enhancing performance, promoting recovery, and improving body composition are all integral to helping athletes achieve their peak capabilities and maintain their health during rigorous training regimens.

However, treating chronic diseases is generally outside the scope of sports nutrition. While nutrition plays a significant role in overall health, sports nutrition specifically targets the needs of athletes in relation to their training and competitive performance, rather than managing or treating long-term health conditions. Thus, the focus of sports nutrition is not primarily on disease treatment, making it the correct answer in this context.