The aim of the study is to determine the effect of breathing and relaxation exercises on dyspnea, fatigue and self-care level in heart failure patients.

The Effect of Breathing and Relaxation Exercise on Dyspnea, Fatigue and Self-Care Level in Patients with Heart Failure: A Randomized Controlled Study It was planned according to CONSORT rules as a randomized controlled study to determine its effect on self-care level.

The hypotheses of the research are as follows:

a: Breathing exercise applied to HF patients has an effect on the mean dyspnea score. b: Breathing exercise applied to HF patients has an effect on the mean fatigue score. c: Breathing exercise applied to HF patients has an effect on self-care mean scores. d: Relaxation exercise applied to HF patients has an effect on the mean dyspnea score. e: Relaxation exercise applied to HF patients has an effect on the mean fatigue score.

f: Relaxation exercise applied to HF patients has an effect on self-care mean scores.

Inclusion Criteria:

(a) 18 years of age or older; (b) Patients with HF stage NYHA II-III; (c) hospitalized for two weeks; (d) Not pregnant; (e) Not applying any integrated treatment; (f) Patients who have been taking the same heart failure medication for at least three months.

Exclusion Criteria:

The exclusion criteria of patients are as follows: (a) Not expected to participate in a breathing or progressive relaxation exercise study in expert opinion; (b) Patients with COPD, (d) Patients with severe mental disorders.

Individuals' eligibility for inclusion and exclusion criteria will be evaluated through patient file records and interviews with the physician.

The universe of the research; all heart failure patients. In order to determine the sample of the study, a similar study Lopes et al. (2018) considering the data obtained from the study, power=0.80, α=0.05 and β=0.20 were calculated. It was determined that 80% power could be reached if the study was conducted with at least 20 individuals in each group, at a significance level of p<0.05, with a medium effect size (ES: 0.5) in independent groups, with a 95% confidence interval. As a result of the calculation, taking into account the problems that may arise during the study process, it is planned to sample a total of 75 patients, 25 patients in each group (intervention group (yoga breathing and progressive relaxation exercise group) and control group).

It is planned to collect data between May and July 2023. Initially, patients' compliance with the inclusion and exclusion criteria will be determined through patient file records and interviews with the physician, and randomization will be performed. The research will be carried out in the hospital with the patients whose sample group is determined. In the first interview at the hospital, BPF, Borg Dyspnea Scale, Piper Fatigue and Self-Care Scale will be evaluated by the researcher through face-to-face interviews with the patients.