Pervasive technologies allow people to get information from everywhere and at anytime. The rapid development of smart mobile devices on the one hand and the progress of wireless networks on the other, has led to the widespread growth of pervasive technologies. Pervasive devices are small pieces of hardware that allow users to communicate over the Internet. Due to their capabilities, which enable users to develop the software they need, many applications for mobile devices have emerged. In this article, we will present data mining in sporting activities using mobile sport trackers. Each tracked sporting activity is saved into a file. Data mining could be applied to the collection of these files, which would help sportsmen analyze their workouts, predict their further training activities, advise about nutrition, etc.