The aim of the study is to investigate the effects of neurophysiological facilitation techniques, applied in addition to Phase I cardiac rehabilitation in the early postoperative period after coronary artery bypass graft (CABG) surgery, on left ventricular function, respiratory functions, and functional capacity.

In this prospective randomized controlled study, participants will be randomly divided into two groups: the control group, which will receive Phase I cardiac rehabilitation, and the treatment group, which will receive Phase I cardiac rehabilitation along with the application of neurophysiological facilitation techniques. The participants' left ventricular function, respiratory functions, and functional capacity will be assessed before and after the interventions.

Inclusion Criteria:

• First-time undergoing open-heart surgery
• Aged between 50 and 85 years
• Full cooperation

Exclusion Criteria:

• Presence of facial, sternum, or rib fractures
• Chronic renal failure
• Development of cerebrovascular events
• Cognitive function impairment
• Development of deep vein thrombosis in the postoperative period
• Presence of neuromuscular disease
• Presence of orthopedic disabilities
• Intubation duration longer than 24 hours
• Staying in intensive care for more than 48 hours

participants will be blind to groups, outcomes assessor will be blind to groups.