Or unless you're a freak of nature part-mule like myself. I'm a horrible runner but a crazy hiker; last year on a battalion conditioning hike I carried 30lbs of body armor, 50lb pack, 8lb M16A4, and a 63lb M2 .50 cal receiver for 8 miles out of 12. However my iron spine is the exception to the rule. "Not to be tried at home" <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />

Oh and I'll vote for kifaru. Great stuff.