Your sacrum is located at the bottom of your spinal column just under your lower back. It is composed of five bones fused together, and helps anchor your lower back to your hip bone. Fractures, or breaks, in this bone are often very painful injuries that can require weeks or months of bed rest to heal. Following the bed rest, your doctor is likely to prescribe exercises to help stretch and strengthen your lower back and core muscles. Check with your doctor to determine which exercises are appropriate for your specific injury.
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Lie down on your back with your knees bent and the soles of your feet on the floor. Cross your arms over your chest and touch your knees together. Use your trunk muscles to lift your hips off the floor until there is a straight line from your knees to your shoulders. Hold this position for about five seconds and then use a slow and controlled motion to lower your hips back to the ground. Repeat.