Today I ran 5 miles, and completed running 1000 miles in the year I'm here at Leavenworth, in addition to the time spent lifting weights/hiking/biking.
For longevity's sake, that is, statistically speaking, 250mi/yr more than necessary. Dr. Ken Cooper has reams of data on thousands of men, most of whom are now deceased, that concludes that 15mi/wk is the point of diminishing returns from running. IE, running more will produce a higher level of cardiorespiratory fitness, but will not make you live a day longer.
Since you are most likely a field-grade O in the Army (C&G @ Leavenworth) what you are doing is most likely the proper path, for now, IMO.
