Posture Affects Standing, and Not Just the Physical Kind
well.blogs.nytimes.com
well.blogs.nytimes.com
You also look more aware with good posture. This deters attackers because they do best when they catch you off-guard. Walking sluggishly also suggests the target is tired, another good opportunity for the attacker.
Could be the chair too!
This works for me at me desk and in my vehicle.
but not too much.. a few things to avoid from the article:
> Bending the head back and sticking out the chin while looking at a computer screen or television. Instead, lower the screen or raise the seat