Runkeeper Support on Twitter: "There could be multiple connections to Runkeeper in your Garmin settings causing this issue. To remove the extra Runkeeper connections from Garmin Connect, log into your Garmin Connect
SyncMyTracks sincroniza tus actividades entre Endomondo, Runtastic, Runkeeper, Strava, Garmin Connect, Nike+ y Movescount | Actividades, Deportes
Runkeeper - Garmin Connect Mobile iOS - Mobile Apps & Web - Garmin Forums
Garmin Connect のデータをRunkeeperに同期する方法 | ランニング研究所
RunKeeper VS Garmin Connect - compare differences & reviews?