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While some people prefer the sound of their breath, footsteps and more keep their pace as they workout, others rely on music; the MusicalHeart App targets the latter while intriguing the former. Not a typical music app, the MusicalHeart App reads the user's heart-rate to recommend songs to listen to while training or exercising. In this way, an athlete is constantly challenged to move to the pace of the music being listened to.

Essentially, the MusicalHeart App will select a song that matches the pre-defined desired intensity level. According to the creators, "The system is personalized--the user sets his or her personal goal (such as a target heart rate zone) and the device recommends and plays appropriate music--considering his current heart rate, target heart rate, past responses to music, and activity level."