Competing interests: The authors are employed and/or consultants of Arsenal Football Club and Universal Music. However there is no financial incentive or interest to the current editorial which is focused on leveraging the power of music for athlete health and performance. Universal Music have created a research-only mobile app 'Sollos Labs' with music content targeting focus, relaxation and sleep. However, the app and its contents are only available to recruited study participants who are provided with invite codes to take part in the research.