What is the biggest problem for you when you're running/trying to start running?

Hi there, Right now we're making an app for running/walking that tracks your activities and at the same allows you to become the king of the captured territory. So, when you move, you delineate a territory. So, you draw various figures (polygons) in your location if you're starting and finishing your workout in the same point. Right now we test a hypothesis that people need some extra motivation to run apart from keeping fit or losing weight and here is the desire to compete with other runners or walkers in this or that location. I've already asked my friends on Facebook and Instagram about their motivation to run. Now I'd like to know what's stopping you from running. Thanks!