All the patients received the usual acute care according to aSAH guidelines throughout the day. Early rehabilitation by the rehabilitation team was performed during daytime (working hours: 8:00a.m.–03:00p.m.), five days per week. The recommendations and defined goals set by the rehabilitation team were continued by the nurses during evenings and week-ends as part of their routine. The OT was available two days each week during the daytime. Both the PT and OT were experienced in the early rehabilitation of patients after severe TBI and adjusted early rehabilitation principles from TBI rehabilitation to the aSAH patients. The early rehabilitation program was specially designed for aSAH patients. Early rehabilitation in patients after TBI in Denmark and Sweden served as sources of inspiration for our early rehabilitation program but needed modification in order to be applicable on patients in the acute state of aSAH.