SAMPLE SIZE: Our preliminary pilot study was powered to detect a 50−metre difference in incremental shuttle walk at the 5% significance level with 90% power. Based on the health resource usage data collected from this pilot study, to detect a 50% reduction in hospital readmission rate at the 5% significance level with 80% power would require a minimum of 60 patients (30 in each group). We propose to study 80 patients in this study