This article examines how optimizing heart function can help to improve performance, especially in endurance activities. It introduces the concept of the 'athlete's heart', which is the idea that the heart's structure and size can be adapted through training for better performance. The article gives tips on how to improve heart health including monitoring heart rate and using interval and endurance training. It also suggests using activities such as yoga to improve heart health and reduce stress levels. Lastly, the article discusses the importance of recovery, good nutrition and getting enough sleep in order to maintain overall heart health.