Why should you vary your running terrains? First it gives diversity to your running, but it also prevents injuries, improve stamina and performance. It can help build those little leg muscles which play important role for technique and balance.
Track is good terrain for interval training. Even if you are long distance runner, now speaking of marathon distance, you should do interval training. On the track you can easily set the distance, without looking continually to your watch. Track is also flat, Continue reading ”Running on different terrains”