Doing sports on a regular basis is beneficial for personal health and well-being. This paper introduces the concept of a mobile app, called OmniSports, which has the goal to assist people already keen on doing sports. It will provide a digital training schedule, which is not only updated automatically in instrumented fitness centers, but also during outdoor exercises which are done as part of digital fitness trails. Within this paper, we present the results of two initially conducted studies: an analysis of current training schedules and an investigation of people's ability to create and use outdoor spots for exercises.