Aim: This study was conducted to determine the effect of progressive muscle relaxation and breathing exercise on sleep quality and exercise self-efficacy in chronic obstructive pulmonary patients.

Methods: This study was conducted as a randomized controlled experimental study. The study was conducted with 64 chronic obstructive pulmonary patients, where 36 of them were in the intervention group and 34 in the control group. Data of the study were collected using the descriptive information form, the Pittsburgh Sleep Quality Index, and the Exercise Self-Regulatory Efficacy Scale (Ex-SRES) for patients with COPD.

Results: When the total scores pertaining to the sleep quality index and exercise self-efficacy of the individuals in the intervention and control groups were compared, it was found that there were statistically significant differences in the intervention group compared to the control group (p < 0.05).

Keywords: Exercise Self-Regulatory Efficacy, sleep quality in patients with COPD, PGE along with breathing exercises, pulmonary rehabilitation

Inclusion Criteria:

• were to be 18 years of age or older
• not using sleeping pills
• verbally stating that they have moderate and severe sleep disorders.

Exclusion Criteria:

• having any lung disease other than COPD
• having cardiological problems (heart failure, uncontrollable hypertension, history of angina and myocardial infarction, heart valve problems), psychotic disorder,
• inability to communicate verbally and having hearing problems.

may be published at the discretion of the authors, provided appropriate justifications are provided.