In a world where physicality has been minimized and our animal nature rejected, our health - both physical and mental - suffers.
Think of a time when we humans lived in nature -- a time before cities, cars, processed food and the Internet.
If you had to lift a boulder, it did not have handles to make itself easier to lift. If you had to climb a tree, it did not come with a ladder to make the ascent easier. If you accidentally came between an angry bear and her cub, there was no referee with a whistle ready to yell "Time out!"
Your body had to be strong in order to complete a multitude of tasks, each with their own requirements: some called for flexibility, others called for speed, others for strength, stamina, agility or balance.
- This is what we train for -
To be ready for any challenge that life throws our way.
In the modern world our challenges are more likely to be things like a natural disaster, an out of control crowd or perhaps even a car skidding off the road into an embankment.
You never know when you'll be called to rise to the occasion, but you can be ready for whatever situation life presents you with.