Those of us who were alive in the 1980′s will remember how much the Walkman revolutionised our workouts. Running and walking were no longer boring, as we could take our favourite music along with us; at least, until the tape was chewed up and ruined. The Discman a few years later, whilst an advance in making our music portable, was no use for the serious exerciser, as the slightest movement caused the CD to jump, let alone taking them on a long run. +