Their technical name is ischial tuberosity.
Right sitting posture on chair.
10 tips for proper sitting posture at a computer desk.
A person can improve posture and achieve a proper sitting.
Keep your pelvis neutral with your buttocks against the back of your chair.
Proper sitting posture at a desk begins at your pelvis.
On the bottom of the pelvis are two knobby bones called sitting bones.
The best sitting position depends on a person s height the chair they are using and the activity they are doing while sitting.
You want to sit with your pelvis in a neutral position with your buttocks against the back of the chair.
Release this sitting position slightly and you re sitting in a good posture position.
If you sit behind a desk for hours at a time you re not doomed to a career of neck and back pain or sore wrists and fingers.
Just adding images and some more information to kapil sharmas answer the sitting posture becomes all the way more important when you have to sit in your office chairs for 9 hours.
These 9 hours demand nothing short of your best attention and devot.
Proper office ergonomics including correct chair height adequate equipment spacing and good desk posture can help you and your joints stay comfortable at work.