 " Beat of My Heart " opens with the sound of a beating heart . In the pre @-@ chorus , Duff 's vocals are made distant by the song 's use of guitars and synth keyboards . She sings that she is going to follow her own interests : " To the beat of my / To the beat of my / To the beat of my heart " . In the first verse , a disinterested Duff sings that she is eager to speak her mind and " yield to her every desire " . In the chorus , she sings that her confidence has strained her relationships with her friends . In the second verse , she sings of being over her depression . An " angry guitar " and a " goth piano " interrupts the song in its bridge . Duff sings that she is only listening to herself from now on . According to Chuck Taylor of Billboard magazine , the line " beat of my heart " is repeated forty @-@ four times in the song . 
