Effects of Drinking Beetroot Juice on Exercise Performance in Patients With Fibrotic Interstitial Lung Disease

Inclusion Criteria: * A multidisciplinary diagnosis of idiopathic pulmonary fibrosis (IPF), idiopathic fibrotic nonspecific interstitial pneumonia (NSIP), chronic hypersensitivity pneumonitis (HP), or unclassifiable ILD with a differential diagnosis that consists of the above diagnoses * Fibrosis on high resolution computed tomography (HRCT): honeycombing, reticulation, or traction bronchiectasis * Oxygen saturation ≥92% by pulse oximetry at rest while breathing room air * Clinically stable for the preceding 6 weeks * Can fluently read and write in English Exclusion Criteria: * Contraindication to exercise testing (e.g. significant cardiovascular, musculoskeletal, neurological disease) (see Table 4 from ERS/ATS consensus statement) * Other significant pulmonary or extra-pulmonary disease that, based on clinical assessment, could impair exercise capacity and/or oxygenation * FVC \<50% or DLCO \<25% * Use of prednisone \>10 mg/day for \>2 weeks within 3 months of the first study visit * Cardiac pacemaker or any metal or electronics inside of the body