Music is a terrific motivator while working out and a new service called Prime Condition (beta) takes it to the next level. The service allows you to design your own workout routine and download a customized mp3 mix. The unique thing about prime Condition is that the workout mix contains a female voice-over that instructs you throughout your workout. The voice provides basic instructions on good form, counts your reps, tells you when to rest, and informs you on what’s coming next.

You create workouts using a cool Web 2.0-style configuration tool. You build a routine by selecting exercises from a set of body area specific menus. For each exercise you can set the number of reps, rep speed and rest time. As you continue to build your workout routine, the service displays the workout’s total time. If you want to mix cardio into your routine, there is an intuitive time-based UI that allows you to adjust the intensity level. For instance after five minutes of biking you can increase intensity, after the next five minutes increase it more, etc. Once you have designed your workout, Prime Condition will let you mix a playlist and generate a downloadable mp3 file with your new workout.

The service provides a free tier that limits your workout to 45 minutes and uses their own music for your mix. For $9 a month you can upload your own mp3s, get queue priority, and encode higher quality workouts. You can also make your workouts public and browse workouts from other members via a tag cloud. The UI is clean and simple but sould use some better organization and consistency. Unfortunately, it does not seem like there is an easy way to share/email your workouts with another person. If you already use a portable player when working out, and are looking for a little extra motivation, you may want to Prime Condition a spin.

Check out my workout mix…