It will be performed using a powerbreath device at 60% of the maximum inspiratory pressure (MIP) amount obtained by measuring mouth pressure. The protocol includes 7 sets consisting of 2 minutes of inspiratory effort and 1 minute of rest. To further confirm the occurrence of fatigue, the patient will score fatigue using the modified Borg scale, and the score will be 5 or above11. During the application, heart rate, blood pressure and peripheral oxygen saturation will be monitored. The measurement will be performed once for each case.

Near Infrared Reflection Spectroscopy device will be used. The device measures and monitors muscle oxygen by taking the reflected rays of infrared rays given to the body from two different sensors to measure muscle oxygenation levels in muscle tissue. The measurement will be made in the dominant lower extremity, and the device will be placed in the mid-thigh region at the distance between the spina iliaca anterior superior reference point and the midpoint of the patella.

Near Infrared Reflection Spectroscopy device will be used. The device measures and monitors muscle total hemoglobin amount by taking the reflected rays of infrared rays given to the body from two different sensors to measure muscle oxygenation levels in muscle tissue. The measurement will be made in the dominant lower extremity, and the device will be placed in the mid-thigh region at the distance between the spina iliaca anterior superior reference point and the midpoint of the patella.

During the fatigue protocol, it will be measured with a finger pulse oximeter attached to the finger

Pulmonary function test will perform by using the Pony Fx spirometry device, and according to the American Thoracic Society (ATS) guidelines. FVC is the volume of air that can forcibly be blown out after full inspiration.