Orthopedic back braces and belts can be classified as lumbosacral belts, lumbar and thoracic supports, or sacroiliac belts. Lumbosacral belts provide lower back and abdominal support. Sacroiliac belts stabilize and relieve strain on sacroiliac joints and the pelvis. Lumbar and thoracic supports are beneficial to people with osteoporosis or arthritis.