In the original recording, the song is played in a bluegrass style, with guitars and banjos as the only musical accompaniment.
"Poor Heart" is written in bluegrass style.
The album consists entirely of covers of songs by the hard rock band Kiss performed in the bluegrass style.
McReynolds was the earliest exponent of the crosspicking bluegrass style on the mandolin.
This form of percussive rhythm is similar to the "boom-chick" in bluegrass styles; it is what gives the music its fast swinging feeling.
In addition, he innovated a two-finger banjo fingerpicking style, which was a precursor to modern three-finger bluegrass styles.
New Grass Revival recorded the song in a progressive bluegrass style for their 1975 album Fly Through the Country.
His bluegrass style is applied to topics ranging from gravity to sexually transmitted diseases to false gods.
They play unplugged covers of death metal songs in the traditional bluegrass style, whilst attempting to maintain the essence of the original.
This form of percussive rhythm is similar to the "boom-chick" in bluegrass styles.