Cardiac Rehabilitation in Coronary Artery Bypass Graft Surgery

Forced Vital Capacity will be measured before six-minute walk test according to the guideline of ERS.

Forced Expiratory Volume in 1 second will be measured before six-minute walk test according to the guideline of ERS.

Peak Expiratory Flow will be measured before six-minute walk test according to the guideline of ERS.

Forced Expiratory Flow 25-75% will be measured before six-minute walk test according to the guideline of ERS.

The 6-minute Walk Test will be performed according to ATS guidelines. Walking distance, minute ventilation, respiratory rate, inspiratory capacity and breathing reserve will be recorded.

The m. quadriceps muscle strength will be measured using the MicroFet 2 hand-held dynamometer (Hogan Health Industries, USA). The test will be repeated three times for the dominant side and the average value in kilograms (kg) will be recorded.

The m. biceps muscle strength will be measured using the MicroFet 2 hand-held dynamometer (Hogan Health Industries, USA). The test will be repeated three times for the dominant side and the average value in kilograms (kg) will be recorded.

Cough Peak Flow (CPF) will be measured using a peak expiratory flow meter. Participants will be instructed to take a maximal deep breath and then cough as forcefully as possible into the device; the highest value from three trials will be recorded in liters per minute (L/min). Measurements will be performed in a seated position, ensuring a tight mouth seal and consistent technique.

Pain assessment will be performed using the Visual Analog Scale (VAS) to evaluate chest pain levels. Participants will be asked to mark their current pain intensity on a 10 cm horizontal line, with "no pain" at one end and "worst imaginable pain" at the other. The distance in centimeters from the "no pain" end to the mark will be measured and recorded as the pain score.

Fear of movement (kinesiophobia) will be assessed using the Tampa Scale for Kinesiophobia (TSK). Participants will complete the 17-item questionnaire, which evaluates fear of movement and re-injury on a 4-point Likert scale. The total score, ranging from 17 to 68, will be calculated, with higher scores indicating greater fear of movement.

Quality of life will be assessed using the Short Form-36 (SF-36) Health Survey. Participants will complete the 36-item questionnaire, which evaluates eight domains including physical functioning, bodily pain, general health, and mental well-being. Each domain will be scored from 0 to 100, with higher scores indicating better perceived quality of life.