Centre of gravity.
If your character is just standing there, regardless as to what their posture is like, the centre of gravity should fall (as the name suggests) through the centre of their body!
On here I’ve shown the centre of gravity as a split between two colours to make it easier to see the mass on both sides.
In the middle there is a lil charmander running, and because he’s in motion there is more mass on one side - the direction he is heading in has more weight pushing him in that direction
and at the bottom, no matter how far forwards your character is leaning, the mass still needs to be equal so they dont fall over!!
It is possible to be in poses where the center of gravity is outside of the body, but as long as the base (whatever feet are currently on the ground and the space between them) is directly below the center of gravity, the pose is stable
I’m not sure what you’re trying to say! The whole thing represents where your weight is in relation to where your supporting appendage is in contact with the ground.
If there is too much weight on one side, you will overbalance and stumble or fall over. What I was trying to convey here was that - unless in motion - the centre of gravity needs to be in the centre or your character will be unbalanced.
(Source: captainharrie, via art-and-sterf)