Inclusion Criteria:  For patients:  Admitted to hospital, Able to provide voluntary, informed consent.  Exclusion Criteria:  For patients:  Health condition that endangers patient by participation due to pain, rehabilitation, and/or negative impact on treatment or care, as evaluated by medical personnel, Pregnancy, Significantly reduced mobility that implies substantial strain for moving in and out of bed, as evaluated by medical personnel Unable to provide informed, voluntary consent personally or by legal guardian, * below 18 years old, Patients with implantable devices such as pacemakers, baclofen pumps, insulin pumps, etc, or Any way identified as 'vulnerable'  The nurse handing recruitment will explicitly check for inclusion/exclusion criteria alignment and document this in the study Enrolment Form. The routine will be to check for formal criteria and to describe the study in such a manner that the patient understands content, and make sure the patient understands before consenting