Both. We all compulsively sleep, eat, and hydrate, but those are not a addictions because they're good for us. With running I suppose the effort to do it, even

Both. We all compulsively sleep, eat, and hydrate, but those are not a addictions because they're good for us. With running I suppose the effort to do it, even if it's a habit, prevents most people from getting addicted to it. And then those that have some psychological 'dependence' on running would not generally be considered 'addicted' because running is mostly healthy.