Bleh .. sounds like I asked a silly question

..
anyway... I thought when i in my shower ... ( swinging and testing in my shower .. something else besides my arm is swinging!)
The section which enable you to turn the most smoothly is the best "flex" location.
Say you got a big tummy. dont flex at the abominal instead use the upper chest or the hips.
If you are Old and it hurts to move your torso.. Use the Hips more.
But if you are really fit , I truly think the abdomen flex is the best. Because it have the most softest tissue and it enable us to swing the smoothest possible. And the Upper arms alignments is the easiest to be intacted this way?
On another hand, I saw somewhere its sometime good to Lock your spine using the axis tilt on the way down... well, I am not an expert.. Just a Noob trying to have some fun challenging the idea.
Just a thought. what do you think about my deduction , Am i daydreaming ?