I have been running now for a year now and have noticed lots of changes;
both physical and mental. I am profoundly amazed at the body's continuance to adapt to the conditions that it goes through. If you take a person that eats non-stop and sits on the couch all day, then his or her body adapt and will supply more cushion (fats) for comfort and support while in that situation. On the other hand, if a person executes a daily regiment of exercise and proper diet, his or her body will adapt accordingly as well. You make of your body what you will and your body, in return, will adapt.
This winter I am working on my mileage base. I did 8 miles yesterday as my long run. I averaged a 11:45 pace. A month and a half ago, I was not conditioned to run that distance, as my body was not adapted to that. Over the course of the last few weeks, I have been building my mileage up adding distance every week (and taking an easy week every 4th). My body has adapted to the distance needed to go to reach that long run goal. The long runs are getting easier, but I am also working on speed as well.
You can take a person who runs 3 miles and present them with the opportunity to double their endurance. This feat is pretty easy. However, I have decided to incorporate speed-work into my weekly runs twice a week, as well as the easy runs and endurance runs (long runs). As of a week ago, I noticed a substantial elevated
course of improvement my body offered me with my running during my long run (
last one of 7 miles). I noticed I am able to go faster. When I first started my running career, I was lucky to do 2 miles in 27 minutes (a fast walk for most, but for me I was running, trying at least). When I do my speed work, it seems my legs are adapting and every time it seems easier (for the most part). I feel more relaxed, and my body does not hurt that much. My old pace seems too slow for me. My body is adapting to my running. I don't know if this happens to you or not, but......when I start out a run, about 1-2 miles into it; my body is recognizing what I am putting it through and responds with "ok, I understand, I'll go along with this running thing, this continuing motion".
What ever y

ou put your body through, it will adapt in most cases.. whether it is speed or endurance. During my year of running, I have noticed a lot of things. I still have a lot of questions. Because of the longer distances, I am finding new things out (chaffing, body relaxation, etc). I could ask and get all of the knowledge before hand, but that would take the fun out of my journey. It is my journey. Running has presented me with challenges, some griefs, pain and suffering, happiness, and pure joy. But, for my running career to accelerate and for me to achieve the runner body that I ultimately want, I know that my body, spirit, and mind must adapt. It has been, and that makes me happy because I have a long, long long road ahead of me.