Cardiac Surgery Rehabilitation: Exercise After Heart Surgery

Heart surgery is a life-changing event. Whether you have undergone coronary artery bypass grafting (CABG), valve repair or replacement, or any other cardiac procedure, the road to recovery requires patience, guidance, and a structured rehabilitation programme. Cardiac rehabilitation through physiotherapy is one of the most important investments you can make in your long-term heart health. At Kinesio Rehab in Putra Heights, we understand the unique challenges cardiac surgery patients face, and we are committed to guiding you through every phase of your recovery safely and effectively.

Why Cardiac Rehabilitation Matters

Cardiac rehabilitation is a medically supervised programme designed to help patients recover after heart surgery and reduce their risk of future cardiac events. Research consistently demonstrates that patients who participate in cardiac rehabilitation programmes experience significantly better outcomes than those who do not. Studies show that cardiac rehab reduces the risk of cardiovascular mortality by 20 to 30 percent and hospital readmissions by up to 25 percent.

In Malaysia, cardiovascular disease remains the leading cause of death, accounting for approximately 15 percent of all deaths in government hospitals. Despite the proven benefits, cardiac rehabilitation participation rates remain low across the country. Many patients are discharged from hospital after surgery without clear guidance on how to safely resume physical activity. This is where physiotherapy plays a vital role, bridging the gap between surgical recovery and a return to an active, healthy life.

Cardiac rehabilitation is not simply about exercise. It is a comprehensive programme that addresses physical conditioning, risk factor management, psychological well-being, and education about heart-healthy living. However, the exercise component is fundamental, and it is the area where physiotherapy expertise is most critical.

Phases of Cardiac Rehabilitation

Cardiac rehabilitation is typically divided into four phases, each with specific goals and guidelines. Understanding these phases helps patients know what to expect and what is safe at each stage of recovery.

• Phase I (Inpatient) — Begins in the hospital within one to two days after surgery, focusing on early mobilisation, deep breathing exercises, gentle walking, and education about sternal precautions
• Phase II (Early outpatient) — Begins two to six weeks after discharge, involving supervised exercise sessions with heart rate and blood pressure monitoring, gradually increasing intensity
• Phase III (Intermediate) — Typically three to six months post-surgery, expanding exercise variety and intensity while reducing supervision as the patient gains confidence and fitness
• Phase IV (Maintenance) — A lifelong commitment to regular physical activity, healthy eating, stress management, and ongoing monitoring of cardiac risk factors

Sternal Precautions and Early Recovery

For patients who have undergone open-heart surgery through a sternotomy (splitting of the breastbone), sternal precautions are essential during the first six to twelve weeks of recovery. The sternum requires adequate time to heal, and certain movements and activities must be modified to protect the healing bone.

During this period, patients should avoid pushing, pulling, or lifting objects heavier than two to three kilogrammes. Driving is typically restricted for at least six weeks. Activities that involve reaching behind the back, carrying heavy groceries, or pushing open heavy doors should be avoided. When getting out of bed, patients should use the log-roll technique, rolling onto their side and using the legs to push up rather than straining the chest muscles.

Our physiotherapists at Kinesio Rehab teach patients proper movement techniques that protect the sternum while still allowing meaningful physical activity. Deep breathing exercises and incentive spirometry are prescribed to prevent lung complications, which are a common concern after cardiac surgery due to reduced lung expansion during the procedure.

Exercise Guidelines After Heart Surgery

Exercise after heart surgery must be carefully prescribed and progressed. The goal is to gradually improve cardiovascular fitness, muscle strength, and functional capacity without placing excessive strain on the healing heart and sternum.

In the early weeks, walking is the primary form of exercise. Patients typically begin with short walks of five to ten minutes at a comfortable pace, gradually increasing duration and speed over several weeks. By six to eight weeks post-surgery, most patients can walk for 20 to 30 minutes continuously at a moderate pace.

Heart rate monitoring is essential during exercise in the early phases of rehabilitation. Your physiotherapist will establish a target heart rate range based on your resting heart rate, surgical procedure, medications, and exercise tolerance. The Borg Rating of Perceived Exertion (RPE) scale is also used, with most patients initially exercising at a level of 11 to 13 (light to somewhat hard) on the scale.

As recovery progresses beyond eight to twelve weeks, stationary cycling, light resistance training, and swimming may be introduced. Resistance training should begin with very light weights or resistance bands and progress gradually. Upper body exercises must be introduced cautiously, with attention to sternal healing. Activities such as gardening, light household chores, and recreational walking can be resumed progressively based on individual tolerance.

Warning Signs to Watch During Exercise

While exercise is beneficial and necessary for cardiac recovery, patients must be aware of warning signs that indicate they should stop exercising immediately and seek medical attention. Safety is always our highest priority at Kinesio Rehab.

• Chest pain or tightness — Any new chest pain or discomfort during or after exercise requires immediate attention
• Excessive shortness of breath — Breathlessness that is disproportionate to the level of exertion or does not resolve with rest
• Dizziness or lightheadedness — Feeling faint or unsteady during exercise may indicate an abnormal cardiac response
• Irregular heartbeat — Palpitations, skipped beats, or a racing heart that feels abnormal should be reported to your doctor
• Unusual fatigue — Fatigue that lasts more than two hours after exercise or exhaustion that prevents normal daily activities

The Psychological Side of Cardiac Recovery

Recovery from heart surgery involves more than physical healing. Many patients experience anxiety, depression, and fear about their heart condition. It is common for patients to worry about whether exercise is truly safe, whether they might have another cardiac event, or whether they will ever return to their previous level of activity. These concerns are entirely normal and valid.

At Kinesio Rehab, we address the psychological aspects of recovery alongside the physical. Our supervised exercise sessions build confidence gradually, allowing patients to see their progress and trust their body's ability to handle increasing levels of activity. Education about the heart and how it responds to exercise helps reduce fear and anxiety. We encourage patients to discuss their concerns openly and connect with support networks including family, friends, and cardiac support groups.

Research shows that patients who participate in cardiac rehabilitation report significantly better quality of life, reduced anxiety and depression, and greater confidence in their physical abilities compared to those who recover without structured rehabilitation.