Ever run a 5 Kilometer race?
ran 3 miles more than a few times in the marines...it was part of our pft (physical fitness test). at 6' and 203 lbs, the best I could put on the books was in the 19's. there were plenty of freaks that could do it in 16 and 17 minute range and never break a sweat. several years later at 6' 243 lbs.... I ran a mile and a half the other day in a whopping 30 minutes....i quickly realized I have a truck, 4 wheeler, a horse, and excellent marksmanship skills for a reason. no reason to run for or from anything...