Listening to fast music makes it easier to clean the house, mow the lawn and do lots of things we think we don't have energy for. Rhythm has a physical impact on us.
Try meditating to fast music or mopping to slow music and you'll see what i mean. The success of zumba and curves has at least as much to do with the music as the moves. Pick upbeat dance tunes for exercise
and smile while you sweat!