This isn't a question about Poweramp that needs to change endomondo, it is that Poweramp needs to support the Android MediaPlayer API. Yes, you can launch 2 applications, but then endomondo won't get the playlist used during the workout. More information here: https://getsatisfaction.com/endomondo/topics/i5whbkoukw058?utm_medium=widget&utm_source=widget_endomondo