It really is all about the beats per minute when it comes to exercise.
Music enhances your performance and can be great way of engaging fully in your physical activity, this works by means of attention diversion. By focusing on your favourite track, your mind is less consumed by the hard work and fatigue of the exercise your undertaking. Also a soundtrack you love will enhance the feel good factor of your exercise routine overall.
So about those BPM’s just make sure the speed of the track is suited to the intensity and speed of your work out. For example a house anthem wouldn’t create the right mood for a yoga or Thi Chi practice, but is more suited to a run or a boxercise workout.
Here is a great article from the Mayo Clinic on measuring your workout intensity against tailoring it to a desired increased heart rate.