To condition the human body I find the best way is by slightly increasing your goal over and over from a similar smaller one, this applies to improving at anything. If you can run a mile, then do that today, tomorrow run 1.1-1.2 miles. Continue this cycle by any factor you feel comfortable with (not necessarily .2) until the distance you have reached has been met. Another tip for any type of physical exercise is to make sure you have a balanced diet for the distances you are running, and to stay hydrated at all times, a good tip for hydration is to drink half your body weight in ounces, i weigh 120 pounds therefore i should drink roughly 60 fluid oz of water a day.
i examine life in detail, basic knowledge, sorry for poor graammer