The Effect of Harmonica Exercises on Cardiorespiratory Exercise Capacity Parameters, Quality of Life and Symptoms of Depression in Patients Undergoing Cardiac Rehabilitation.

The project concerns patients with heart diseases participating in a hybrid cardiac rehabilitation program. The hybrid cardiac rehabilitation program takes place in two periods: an initial hospital stay and a main period at home. The initial period allows for the optimization of pharmacotherapy, performing necessary laboratory tests, performing assessment of exercise capacity , planning and conducting training sessions, education focuses on pro-healty behaviours and psychological counseling. The main period is carried out at home and consists of systematic physical training carried out under the supervision of medical personnel.

As part of the effects of cardiac rehabilitation, it is recommended to perform endurance training appropriate to the patient's clinical condition, elements of resistance training and a set of general exercises: including breathing, relaxation, stretching, balance and agility exercises. Breathing exercises are used to improve breathing efficiency and increase the capacity of the respiratory system. The exercises can be performed in a static form, when the patient inhales and exhales in a specific respiratory path, and in a dynamic form, when breathing exercises are combined with movements of the limbs or torso. The training is performed 3-5 times a week for a minimum of 8 weeks, duration is approximately 20-30 minutes. Exercises on the harmonica consist of repeatedly overcoming the very small respiratory resistance created by the instrument during inhalation and exhalation, which results in the generated sound. Therefore - unlike most other wind instruments, which have an adverse effect on the respiratory system - the harmonica was used in exercises for patients with significant respiratory diseases. In the available literature, there are no studies on the use of the harmonica in patients with heart diseases.

One of the most serious and widespread problems of patients with cardiovascular diseases is reduced quality of life and symptoms of depression. Therapy or rehabilitation using music can improve the mental state, sense of self-efficacy and sense of bond with other people, especially among people with symptoms of mood disorders, PTSD or substance abuse. There are no studies on the effect of musical interventions (e.g. using a harmonica) on the somatic and emotional state of people after cardiovascular incidents.

The harmonica exercises were developed by a professional musician, music educator and health sociologist. Duration of a single exercise session: 30 +/- 10 minutes. During the hospital stage, patients will have three lessons with musicians and will receive materials for home exercises. Online communication with musicians will also be possible, in case of doubts about the exercises. Harmonicas used in the study: standard diatonic harmonicas. Principle of exercises: chord playing based primarily on playing rhythms, not melodies, which is the equivalent of exercises for people starting to learn to play the diatonic harmonica.

Patients will receive diaries describing the recommended breathing exercises for the control group and additionally exercises with the harmonica for the study group. In both groups, patients record the amount and time of exercises. After the completion of the rehabilitation cycle, 4-5 weeks, an assessment of the patient's exercise capacity and psychological state will be performed, oriented to refer to the project's goal.