Couple more things to think about, I can't think of that multi million dollar football players name that went to Afganistan with our Army and got killed. He was in the best shape possible.
If your in a fight that has gotten down to fist,feet and teeth your strength will come in handy. But you might look at all the ways our men get killed in war and ask yourself how many got to use their muscle.
There is an old saying "train hard , so you will make a good looking corpse"
As I get older the training I do is to shoot the enemy and the better and faster I can do it the less likely he will shoot me. You won't stay in physical shape forever
Sorry if I have offended anyone.