To know the current state of your body
It is important to know your current physical condition.
And if you focus on yourself to know it, it will also prevent pain.
Where muscles are tense
Where the centre of gravity is on the body
The body is leaning
It has a rolled shoulder.
My toes are tense.
And so on
You don't have to be conscious and sharpen your senses.
You can change your body just by turning your attention and noticing it.
Don't you feel your toes are tense even if you think you are relaxing and watching TV?
With a little consciousness and awareness, you can prevent pain and symptoms.