Listening to music during workouts is essential, but sometimes it can do more harm than good. The problem is, I can't help but run to the beat of the music. Finding a song with a tempo that matches your exercise pace does the trick, but building perfect gym playlists takes time. Bestworkoutmusic.com is a site where you can search for and purchase songs to help solve this dilemma. After starting by figuring out your preferred pace matched to beats per minute (bpm), the BeatScanner feature allows you to select tracks from your library using the bpm rate that you specify. Even better, for all of your favorite songs that don't quite match your pace, there is the Repacer which changes the beat of any song to match your work out, a feature formerly only available to aerobics instructors and DJs. The great service would benefit greatly from a site redesign and unfortunately, it is only PC compatible for now.