This prospective cohort study evaluated the impact of implementing a mobility protocol on the proportion of ICU patients receiving physical therapy vs. usual care. Eighty percent of protocol patients received greater than 1 physical therapy session compared to usual care (47%). Protocol patients were out of bed 6 days earlier than SICU patients. ICU stay was improved by 1.4 days (P=0.025), and hospital length of stay was improved by 3.3 days (P=0.006) in protocol patients.