Guro Birgitte Stene

1 Introduction Sarcopenia is a progressive, age-related skeletal muscle disorder marked by declining muscle mass and strength and/or physical performance [1]. It is associated with adverse health outcomes [1, 2], including increased risk of falls and fractures [3, 4], dependency in activities of daily living [5], mobility impairment [6], diminished quality of life [7] and premature death [8].