This exercise program includes aerobic exercise, resistance exercise and respiratory exercise training for eight weeks.

It is the volume of air exhaled rapidly and forcefully following deep inspiration. Healthy people can normally exhale 80% of their lung volume in 6 seconds or less. In people with severe obstruction, this period may take up to 20 seconds. This parameter will be assessed using spirometry (Cosmed Microquark-PC Based Spirometer, Rome, Italy) according to the criteria of the European Respiratory Society (ERS) and the American Thoracic Society (ATS).

Respiratory muscle strength will be assessed with a portable, electronic oral pressure measuring device (Cosmed Pony Fx, Milan, Italy). Respiratory muscle strength will be determined by measuring maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP). Percentage of expected reference values according to gender and age will be used for the MIP value. The clinical significance for this patient group is 17.2 cmH2O for the measured MIP value.

The COPD Assessment Test (CAT) will be used to assess health status impairment in individuals with COPD. The CAT is an eight-item test consisting of questions that evaluate the severity of symptoms such as dyspnea, cough, and sputum production and the impact of the disease on daily life. It is recommended that the minimal clinical significance is a change of 2 points.

Muscle activity of transversus abdominis (TrA), rectus abdominis (RA), lumbar multifidus (LM) and quadriceps muscles will be evaluated. Muscle activity will be evaluated using surface electromyography (EMG) (Neuro-MEP, Ivanovo, Russia). There is no cut-off value for these parameters in this patient group. The changes will be stated numerically and as a percentage as a result of the evaluations of the patients before and after the exercise training.

Muscle thickness of transversus abdominis (TrA), rectus abdominis (RA), lumbar multifidus (LM) and quadriceps muscles will be evaluated. Muscle thickness will be evaluated using ultrasound (LOGIQ P9, GE Healthcare, USA). There is no cut-off value for these parameters in this patient group. The changes will be stated numerically and as a percentage as a result of the evaluations of the patients before and after the exercise training.

The Timed Up and Go Test (TUG) will be used for the balance assessment of individuals participating in the study. TUG is a frequently used, easily applicable, valid and reliable, performance-based functional mobility and balance test that evaluates dynamic balance in the clinic. It has been shown that dynamic balance impairment in COPD is associated with inadequate oxygenation and peripheral muscle weakness. Individuals who complete the test in 12 seconds or more have a risk of falling. This test, which has different cut-off values according to some disease groups, has a value of 13.5 seconds for general adults.

Functional reach test will be used for the balance assessment of individuals participating in the study. Individuals who can reach 25 cm and more have a low risk of falling. Individuals who can reach between 15-25 cm have a 2 times higher risk of falling than normal. Individuals who can reach 15 cm and below have a 4 times higher risk of falling than normal. Individuals who cannot reach at all have an 8 times higher risk of falling than normal.

St. George's Respiratory Questionnaire (SGRQ), a seventy-six-item health-related quality of life assessment questionnaire, will be used to assess the quality of life of the subjects.The result values are between 0 and 100 and the higher the value, the greater the degree to which the patient's quality of life is affected by the disease. Minimal significant variability in the treatment response follow-up was stated as a 4 point change.

The Hospital Anxiety and Depression (HAD) scale will be used to determine the anxiety and depression levels of individuals participating in the study. This scale is a self-report scale that includes anxiety and depression subscales and consists of 14 items, seven of which investigate depression and seven of which investigate anxiety levels.The cut-off point for the anxiety subscale of the HAD Turkish form was found to be 10 and the cut-off point for the depression subscale was found to be 7. Patients who score above these points can be considered as a risk group. Anxiety and depression score 07: normal, 8-11: borderline, >11: anxiety and depression

6MWT will be used to evaluate the exercise capacities of individuals who will participate in the study. The individuals' walking distance and cardiac parameters during the test will be recorded.