hi, thank you for providing the brief history of you. I should be thankful to god as well that luckily you are out of danger is spinal cord injury. All the blessings of God be upon you. As you mentioned you have a D12 Vertebrae fracture, I think it will be fracture of the body of the vertebrae. As mentioned, you should really take a proper care initially because of the allow the callus to form inside the fractured bone. Since it is a crucial place you should be really careful. Movements you should avoid are bending and twisting in bed. You should just lie down. Also, also with that, perfrom slow breathing exercises to keep the respiratory system intact and also perform some little exercises. You can consult your physician and a physical therapist for the same as some maintenance of the muscle property is required. Also, consume good calcium supplement through diet which will act as a boost to the healing. Once you are adviced to move out of bed, discuss with your physician priror to initiative of any exercises. Performing good exercise to stabilize the core and the spine will help you avoid future back pains, but it is unsure if you really can avoid. because at some stage of life everyone should have once a while back pain. In the duration of your rest if you find any abnormality in you functions or symptoms kindly consult the same physician at the earliest to avoid any major issues to override the healing process. Usually, people can go back to activity soon depending upon the type of fracture. Also, in future without making the body fit undergoing any sports will not be advisible to avoid any future problems. With the grace of God you are really lucky. Regards Jay Indravadan Patel