What is your body's natural response prior to any training?

What is your body's natural response prior to any training? Does that have any protective or tactical application? If so, why aren't we incorporating it into personal defense? Tony Blauer discusses these questions and more.

And not forgetting .............
Todays Crossfit W.O.D @Crossfit Hove
AMRAP (As many rounds as possible) 15 minutes
5 Front Squat 50kg
10 Box Jumps 61cm Box
200m Run
with 10kg weighted vest
5rounds + squats and box jump sets