Intervention protocol Physiotherapy interventions received by the two study groups are documented in Table 1. The IT group will receive physiotherapy twice daily with longer duration and higher intensity. After postoperative day5th, the training intensity will be prescribed at ventilatory anaerobic threshold (VAT) based on the submaximal exercise test in which the end point is supra-VAT. All physiotherapy interventions will be undertaken by one physiotherapist, specifically trained in the education and treatment methods used in the study.[15-17]