While listening to music your body undergoes changes that can be attributed to the tempo of the music. During exercise your body goes through changes in the sympathetic/parasympathetic nervous system. Music has shown to have effects on these systems at rest but the literature is limited in what happens to the body when listening to slow or fast tempo music while exercising. With this, what is better to listen to while working, out fast or slow music? This study looks to try and find an answer to this. Participants were brought in for a baseline session where HR and RPE were recorded at a varying intensity. They were then brought in for two more sessions. One of the sessions slow tempo music was played, the other fast tempo music was played. Results indicated that no real physiological psychological effects were seen with fast or slow tempo music. However, results did show that the enjoyment level of the exercise can be greatly impacted by the addition of music and the tempo of the music. This data concluded that three was no physiological/psychological effects but that the enjoyment levels operating independently of these should be investigated further.