Bushmaster,
check out this link.
https://www.cnet.navy.mil/nascweb/ocs/ocs_phystraining.htm
It has links for a good conditioning program and an EXCELLENT stretching routine. The trick about stretches...Do ALL the stretches EVERY time for a MINIMUM of twenty seconds on each stretch. Personally, I am a big fan of stretching because it allows me to maintain flexibility and range of motion. I lift weights and I notice very few people stretch between sets at my gym. For some, their flexibility is so bad they cant even touch their shoulders, much less run. REAL BAD. :<
If you are properly stretched (before and after a workout) then you will find running much more enjoyable.
Regarding what can be wrong medically, well, I am not a physician and I dont want to put nasty thoughts into your head. However, some problems are more prevalent than others. For example, you may find you simply have low blood Iron (anemia) or low blood sugar (hypoglycemia) both of which can easily be corrected by adjusting your diet. However, it is also nice to make certain you dont have more serious, though rare, problems (e.g. heart valve irregularities, or pulmonary disorders). I wouldn't be concerned with the latter too much if you have been getting regular check ups.
Regarding diet, I honestly cant tell you how much you should be eating, but if you eat more fruits and veggies than, say, grains and other complex carbohydrates then yes, you will burn out pretty fast. Veggies have relatively few calories and little complex carbohydrates. Fruits may have more Carbs, but these are usually simple carbs (sugar) and burn off like gasoline. Also, you said you start out good during the beginning of the week and taper off as the week goes on (or thats how I read it) and you rest on the weekends. Thats not how it generally works. Go hard one day, rest the next day, go moderate the third day, light the fourth day, Hard the fifth day, and rest on the sixth day. Or something like that. Basically you should go from periods of equal exertion to equal rest. You cant "save up" and rest for the weekend or you will see a trend like you described.
I am sure there are other great sites on the web about running, start with "Runners's World" magazine website and see what links are available.
Two questions, When do you start OCS and do you smoke. Be honest :>
Good luck,
Bryce
In the end it all comes down to a simple choice, get busy livin' or get busy dyin' - The Shawshank Redemption