Objectives: The primary objective of the pilot randomized RELEASE and SENIOR trials is to assess our ability to recruit 50 non-elderly ( 65 years) critically ill adults into parallel trials comparing once vs at least twice daily screening. Secondary objectives are to evaluate clinicians’ adherence to the screening protocols, assess current practices related to management of sedation, analgesia, delirium and patient mobilization before screening assessments, identify barriers to enrollment, characterize trial participants based on weaning difficulty, and obtain preliminary estimates of the alternative screening strategies on clinical outcomes. In the SENIOR trial, we will also compare recruitment metrics and intervention effect between elderly (65 to 80 years) and very elderly (>80 years) participants.