Anriany Hanzy Sinambela, Amira Permatasari Tarigan, Pandiaman Pandia Departemen Pulmonologi dan Ilmu Kedokteran Respirasi, Fakultas Kedokteran Universitas Sumatera Utara, RSUP H. Adam Malik Medan Abstract Background: Hypoxemia during exercise could be occured in COPD and could decreased pulmonary rehabilitation tolerance. The purposed of this study is to determine the effect of exercise on oxygen saturation […]