After any surgery, there is a chance of complications. After lung surgery to remove tumours, there is a particularly high chance of a person developing an infection or needing help breathing, called post operative pulmonary complications. Currently, the risk of these complications is reduced through the completion of light physical and deep breathing exercises and walking around as soon as possible after surgery. Another possible way of helping these patients is to use a small device called an Incentive Spirometer to encourage and measure deep breathing. This study wants to compare how often postoperative pulmonary complications happen after major lung surgery between a group completing the exercises alone and a group using the Incentive spirometer in addition to the exercises. It is hoped that the combined therapy will reduce the amount of time patient must stay in hospital, have fewer complication events and have fewer patients re-admitted back into the hospital after they go home, so that patients overall have better outcomes.