6 Related Work
The increasing popularity of sport trackers has recently attracted the research community to
understanding and analyzing this kind of data. An initial discussion about the secondary use of
sensor data and the emergence of a conceptual architecture is provided in [13]. The main focus of
current research in sports-oriented data is to understand its geographical distribution. A recent
work [14] identifies popular sports areas in individual cities by using sensor data gathered from
the Nokia Sport Tracker service. Another study [21] extracts and analyses sensor data from
the MapMyFitness sport tracker server in order to describe the use of sports related facilities in
Winston-Salem, USA. A full discussion about how this kind of data can be used to acquire an