Frequent changes and expansion occur within the relationship. It is so intense that often one of them may run from the relationship — this is what is commonly known as the runner/chaser stage. There may be difficulty in being together for long periods of time.

Is trail running easier on body?

Most road runners spend their entire career perfecting their stride and gait as to minimize the uneven movement that side to side trail running encourages. So there you have it, Trail running is definitely not harder on your body than road running and cross training between the two can be beneficial for both sides.