The disclosure relates to uses and regimens for accelerating/improving physical recovery in a patient with disuse atrophy triggered by reduced mobility due to a hip fracture and consequent major surgery, which employ a therapeutically effective amount of a myostatin antagonist, e.g., a myostatin binding molecule, e.g., a myostatin antibody or an ActRII receptor binding molecule, an ActRII receptor antibody, such as the bimagrumab antibody.