The way of right sitting straight

Is that the all of you are sitting straight groups when they sit down on the floor and sit down sitting cross-legged group?
As for the person whom it does not fit, as for the sitting straight, there may be foot gashibirerude, the person to sit cross-legged if you sit down for a long time.
However, a burden hangs to the waist when you do this sitting cross-legged for a long time and causes lumbago and the sciatic neuralgia.
You understand that you try it, but really become posture a pelvis inclines behind when you sit cross-legged, and to bend a waist.
This is not good for a waist.
And you put a burden on a joint by opening both legs.
Then it is way of sitting down that does not turn to sit down on this for a long time again when it is said how about the sitting straight.
When the sitting straight sits down in the reverse of sitting cross-legged, it is the form that a pelvis inclines before, and the upper part of a person's body bends into.
Because you strongly bend the knee, sitting cross-legged is similar and is not good for a joint either.
Then there will be many people thinking how I should sit down if both sitting straight and sitting cross-legged are impossible.
How to sit down on these is not not to be good at all for a body.
It leads to lumbago and sciatic neuralgia for a long time that there is in the same posture, how to sit down.
Therefore it is important to change a posture immediately if it feels it when it became slightly hot.
If it is not made, a burden lightens when even sitting cross-legged catches cushions in the seat, and even sitting straight raises buttocks.