Being Awake, Upright and Moving as the Basis for Early ICU Physiotherapy

o Patients will receive the usual physiotherapy treatment in ICU in Iceland from day 5 after intubation, which adheres to international standards of practice, including the potential for no treatment. Usual physiotherapy once daily for 20 minutes.

o Patients will receive the intervention physiotherapy treatment consisting of exercises and a progressive upright positioning and mobilization (20 minutes) twice daily from day 3 (\>48 hours) after intubation including the potential for no treatment, if they are stable, even though they are not completely alert, Total treatment time of 40 minutes.