This paper investigates the link between adolescent mental health and involvement in sports and music. With a focus on preventive measures, it introduces the concept of brain health, a holistic framework intersecting cognitive development and mental health. The paper explores the roles of music and sports in enhancing high school students' brain health. Music, encompassing instrument training, therapy, and listening, proves beneficial cognitively and clinically. However, accessibility challenges, particularly for lower-income students, underscore the need for affordable education and increased support for music therapy. Parallel insights into sports highlight cognitive and mental health benefits but underscore information barriers hindering student participation. The paper proposes practical solutions, including beginner music courses, affordable instrument access, increased support for music therapy, increased access to non-competitive sports, and improved communication regarding high school sports and music. The research urges a change, recognizing brain health as integral to holistic well-being, and calls for actionable integration of music and sports into high school environments for lasting positive impact.