This randomized clinical trial seeks to compare the efficacy of the Active Cycle of Breathing Technique (ACBT) and Buteyko breathing techniques in sternotomy patients undergoing coronary artery bypass graft (CABG) surgery, aged 30 to 60. Data will be collected from Surgical Intensive Care Unit (ICU) in selected hospitals. Participants will be assigned to intervention to receiving ACBT and Buteyko breathing techniques standard protocol including chest percussion , tissue blowing exercises, incentive spirometer , cough technique, breathing control, deep breathing, and deep breathing techniques.

This randomized clinical trial seeks to compare the efficacy of the Active Cycle of Breathing Technique (ACBT) and Buteyko breathing techniques in sternotomy patients undergoing coronary artery bypass graft (CABG) surgery, aged 30 to 60. Data will be collected from Surgical Intensive Care Unit (ICU) in selected hospitals. Participants will be assigned to intervention to receiving ACBT and Buteyko breathing techniques standard protocol including chest percussion , tissue blowing exercises, incentive spirometer , cough technique, breathing control, deep breathing, and deep breathing techniques. The three-day trial, starting upon ICU/CCU admission, will measure primary and secondary outcomes before and after each session for both groups. Statistical analysis using SPSS version 25 will be employed post data collection.

Inclusion Criteria:

• Age 40-60 years
• Patient underwent cardiac surgery for first time
• Having speaking, hearing, cognitive ability
• Both genders ( Male and female)
• On mechanical ventilation for less than 24h after surgery

Exclusion Criteria:

• • Hemodynamic ally unstable patients

  • Patients with reopening of sternum
  • Infection patients
  • Renal failure
  • Arrhythmia
  • Patient on mechanical ventilator
  • Cancer
  • Tuberculosis