Following the operation, it is necessary to spend around a week in intensive care before returning home and the first few days are often uncomfortable. Most adolescents can expect to return to school from 2-4 weeks following surgery, but pain medication may be required up to 6 weeks following. A full recovery from the procedure can take up to a year, as it can take that long for the spine to heal fully. Spinal fusion surgery causes the fused portion of the back to become permanently stiff, as a result, returning to sports that require large amounts of flexibility (ballet, yoga, gymnastics, dance) or contact (rugby, football, karate, hockey) may take longer.