If you crave tunes while you workout, then check out this S2 Sports Net MDM-

Record your music from multiple sources and monitor your recording levels from your microphone or line input with Sony's Hi-MD field recorder. The MZ-RH1 not only gives you the ability to record music from multiple sources, but takes playback sound quality to the next level. This compact device plays back MP3, Linear PCM, ATRAC and ATRACplus audio formats, and supports WMA and WAV formats with conversion to ATRAC3 format. ATRAC, Sony's own format, provides higher sound quality at a small size. The MZ-RH1 is backwards compatible, so you can revive your old MiniDisc libraries as digital music by uploading music to your PC. Enjoy superb CD-quality sound whether you're listening to music recorded at a live concert or from your own personal library. VPT Acoustic Engine & 6 Band Equalizer ... Less