Present study aim to gain an understanding of functions needed and strategies used for patients following hip fracture surgery to be independent in basic mobility activities during acute hospitalization, and establish knowledge of how much (or little) patients get out of bed.

Within the patients included in this cohort study (1), a subgroup will also be included in a satellite study (2), with a separate objective. Definitions are presented in the detailed description below (objectives 1-2).

The objectives are;

1. To determine levels of physical activity among a broad representation of patients hospitalized following hip fracture surgery, and secondly to explore the association with 30-day readmission, and mortality.
2. To understand and define which functions and strategies are needed for patients hospitalized following hip fracture surgery to be independent in the basic mobility activities: getting in/out of bed, sit-to-stand from a chair and walking.

Inclusion Criteria:

• Patients who have undergone surgery for hip fracture at Hvidovre Hospital admitted to department 210/212 or at Bispebjerg Hospital department M1.
• Being able to participate in basic mobility activities with assistance pre-fracture (Cumulated Ambulation Score (by recall) ≥ 3)
• Able to give written informed consent or having a relative/legal guardian to give written consent, not later than on 3rd postoperative day

Exclusion Criteria:

• Postoperative weightbearing restrictions
• Multiple fractures
• Suspected pathological fracture due to cancer
• Terminal illness
• Post operative medical complications limiting the patient from getting out of bed
• Patients with permanent residence in a nursing home
• Patient unwilling to cooperate for testing

Patients will be recruited from Hvidovre Hospital and Bispebjerg Hospital. A subgroup of patients from Hvidovre Hospital will also be recruited to the basic mobility satelite study (being filmed on 3-5 post operative day). This subpoplulation has slight different eligibility criteria. Addition to the inclusion criteria below: their pre-fracture CAS =6, able to give written informed consent, not later than on 5th postoperative day and able to speak and understand Danish. Additional exclusion criteria: Post operative medical complications limiting the patient from participating in physio- or occupational therapy, history of stroke with motor disability, cognitive dysfunction determined by chart review, reported by nursing staff, or observed by trained research staff (disoriented, dementia, active delirium), patient unwilling to participate in rehabilitation post-operative or do not want to cooperate for testing and to be filmed during transfer out/in of bed