Preventing sciatica isn’t always possible; there are some things that you can do that may help. These things include the following,  Exercising regularly will help to strengthen your back and improve your posture. To keep your back strong, focus on your abdomen and lower back muscles, as these are essential for having good posture and alignment.  Be conscious of your posture when sitting. If you’re forced to sit for long periods, be sure to select a quality chair that supports your lower back and has armrests and a swivel base. You can also add a pillow or rolled towel behind the small of your back to maintain its normal curve. You’ll also want to keep your knees and hips level. Improve your body mechanics when standing for long periods. You can do this by resting one foot on a stool or box and alternating them from time to time. If you’re lifting something heavy, be sure to lift it from the legs and move straight up and down.  Be careful not to twist when lifting. It’s always best to have a lifting partner when possible.