If you spend several hours a day at your computer, maintaining a proper workstation layout and practicing good posture can help minimize the risk of injuries, aches and pains. Use these ergonomic tips to help your body assume a neutral, strain-free position: Sit upright — no hunching or slouching — with your feet flat on the floor in front of you. Your back should be fully supported by your seat, with lumbar support. Keep your shoulders relaxed, allowing your upper arms to hang naturally. Your elbows should be close to the body and bent between 90 and 120 degrees. Your thighs should be parallel to the floor, and your knees should be close to the same height as your hips. Keep your monitor about an arm’s length away; the top of the screen should be eye level, so that you can read it without craning your neck up or down. Also, be sure to stand up and walk around several times an hour to allow your body to stretch.