What is the proper way to sit to prevent sciatica?

Sitting properly is an important part of your effort to prevent sciatica. Your hips and your knees should be level when you sit. If you're seated at a desk, your feet should be flat on the floor, and your elbows should be bent at right angles. When selecting a chair, choose one with adequate support for your lower back. A swivel base and arm rests are also recommended. A properly placed rolled-up towel or small pillow can help you keep the natural curves of your spine.