If you had to run a mile, could you do it? I don't mean in a race, or among friends. I mean running a mile as if your life depended on it? How about the life of your spouse, or your child?
Really? How about after a full meal? Or after three drinks? Or if you were ill? Or injured?
How about through pouring rain? Or through standing water?
What if you were carrying someone else?
Just to test, I ran around a lake with my son on my shoulders, while we were on vacation. We were near the recent shuttle launch, and I used the Magic If. "What if that shuttle exploded and there was rubble landing all around me?" I needed to get to shelter: to save myself and my son. I had just had a full meal, and a beer. I couldn't do it.
Could you?
While you never know what adrenaline can do, wouldn't it be good to know that it was possible to run like that in a Magic If situation? If you had the energy of a real life or death situation it should be even easier - you should be able to go twice as far.
This is something that everyone should think about - not just warriors. It doesn't take the shuttle exploding to make for a situation in which a person might have to run a mile under less-than-optimal situations. Train like you needed to run that mile to save what is dear to you.