I always try to sincronize ,my heart BPM and walking speed to music BpM ,this have various effects :
Improved performance: When your heart rate is synchronized with the beat of the music, it can help you perform better and increase your endurance during physical activities such as running, cycling or working out at the gym.
Reduced stress: Synchronizing your heart rate with the rhythm of the music can help reduce stress levels and create a calming effect on the body, which can lead to better focus and concentration.
Enhanced motivation: The synchronization of your heart rate with the music can help you stay motivated during workouts and other physical activities by increasing the overall enjoyment of the experience.
Better synchronization with group workouts: In group workouts, synchronization of heart rate with music can create a sense of community and teamwork, which can lead to a more enjoyable experience and better results.
Increased efficiency: When your heart rate is synchronized with the beat of the music, your body can work more efficiently, leading to better performance and faster results.
Improved recovery: Synchronization of your heart rate with the music can help speed up the recovery process after physical activity by reducing stress and promoting relaxation.
Greater calorie burn: Synchronizing your heart rate with the music can lead to a higher calorie burn during physical activities, as it allows you to work out more efficiently.
Enhanced mental clarity: When your heart rate is synchronized with the beat of the music, it can help improve mental clarity and focus, which can lead to better performance in tasks that require concentration.
Improved mood: The synchronization of your heart rate with music can create a positive and uplifting mood, which can enhance the overall experience of physical activity.
Increased enjoyment: Synchronizing your heart rate with the beat of the music can make physical activity more enjoyable, leading to a greater likelihood of sticking with it long term.
I would develop a feature where the song that you play adapts to the heart rate in real time or each 10 seconds .