how to sit
Steps. 1  1. Sit up tall. Push your hips as far back as they can go in the chair. 2  2. Sit close to your keyboard. Position it so that it is directly in front of your body. 3  3. Adjust the keyboard height. Make sure your shoulders are relaxed, your elbows are in a slightly open position, and your wrists and hands are straight.
To know whether a chair fits, here are a few rules to sit by: 1  Feet should reach the floor. 2  Five chair legs are better than four for added stability. 3  Hips should be the same level or higher than the knees.  Forearms ought to rest easily on the arm 1  rests. Sit completely against the back of the chair. [ source: UCLA Ergonomics]