Music Gym (com.playir.musicgym) on Google Play
When you fire up this app, your songs will immediately jump to the good parts of the track when playing. Perfect for taking with you to the gym, to skip past the boring introductions and endings and keep you pumped up and working to the extreme.Finally, don't forget to try the 'Gym mode' which hijacks the volume buttons to skip between tracks instead, allowing you to quickly shuffle to your favourite songs without losing your pump.Also features a beautifully slick 3D interface for those artsy folk.