Interstitial lung disease (ILD) is a highly disabling group of conditions including idiopathic pulmonary fibrosis (IPF), acute and chronic interstitial pneumonias, connective tissue diseases and sarcoidosis. People with ILD frequently experience breathlessness on exertion, which limits their ability to undertake daily activities. People with ILD report very poor quality of life due to low levels of physical functioning and vitality, and high levels of breathlessness and fatigue. There are few treatments for ILD and those that are available have limited impact on quality of life.