Sedentary behaviour among medical inpatients is strongly associated with hospital-associated functional decline and poses a severe threat to patients' functional capacity and independency. High human and socioeconomic costs underline the urgency to find solutions to this world-wide problem.

Objective: This multicentre study, including a total of 400 patients from Copenhagen, Aalborg, Tórshavn, and Nuuk, will assess the effect of a digital intervention that aims to reduce sedentary behaviour and increase physical activity in medical inpatients.

Intervention: Digital feedback and nudging regarding the patients' physical activity levels to patients and healthcare staff Design: Stepped-wedge cluster randomised multicentre trial Primary outcome: Daily average time of patients' physical activity (minutes).

Inclusion Criteria:

• Admitted to one of the participating wards
• Has understood and signed informed consent
• Reads and understands Danish, Faroese, Greenlandic or English

Exclusion Criteria:

• Has an expected hospitalisation less than 24 hours after potential recruitment

• Is not able to give informed consent to participate in the study

• Has allergy towards band aid

• Not able to (shortly) stand in an upright position even with maximal assistance

• There are contraindications for the patient to mobilise or be physically active due to unstabilized acute medical conditions, including, but not limited to, acute aortic dissection, -myocardial infarction, -pulmonary embolism, -sepsis.

• There are ethical concerns regarding the patients' participation in the study, including, but not limited to, the patient being:

  • In the terminal phase of life
  • In a crisis state regarding their disease/situation and deemed unfit for participation

To ensure medically responsible inclusion of patients, the project personnel will consult and confer with the treatment responsible medical doctor, or their delegate, before including a potential participant for the trial.