Get situated. Sitting the healthy way doesn’t always come naturally. The key is “aligning your pelvis so that it supports the spine”: Center your weight over the front edge of your “sit bones” and “imagine ‘wagging’ your tailbone” into position. Your thighs and torso should form a 90-degree angle and both feet should be flat on the floor.
Move your monitor. Your computer’s monitor should be “at least a foot and a half from your face” with its center “six inches below your gaze.” This will naturally keep your chin pointed slightly down.”
Don’t overreach. As you begin to type, place your arms close to the body with elbows bent at 90 degrees. Keep your wrists in an unbent “neutral position.”
Take breaks. “Every 30 minutes, get up to stretch and walk around.” You can only maintain good posture for so long.
Source: Ladies’ Home Journal