Exercise After Bypass Surgery: What to Expect and How to Get Started
After coronary artery bypass graft surgery (CABG), returning to exercise can feel like a big step. You might be keen to rebuild your fitness and get back to your usual routine, or you might feel unsure about how much movement is safe while your body heals.
You may notice that activities that once felt easy now leave you tired, that your strength has reduced, or that you're less confident using your arms and upper body.
These experiences are common during recovery. The important thing to remember is that you can gradually rebuild your strength and fitness while allowing your body time to heal.
With appropriate guidance, exercise can help you regain confidence, return to everyday activities and support your long-term cardiovascular health.
Why is exercise important after bypass surgery?
CABG improves blood flow to the heart muscle by creating a new route around narrowed or blocked coronary arteries. However, surgery is only one part of managing coronary artery disease.
Exercise plays an important role in recovery and ongoing heart health. An appropriately prescribed exercise program can help you:
Rebuild aerobic fitness and exercise tolerance
Improve muscle strength and make everyday activities easier
Gradually return to activities you enjoy
Improve confidence with movement
Support the management of cardiovascular risk factors
Develop sustainable habits for long-term heart health
Exercise isn't about getting back to your previous fitness as quickly as possible. It's about building your capacity safely and consistently over time.
When can you start exercising after bypass surgery?
Movement usually begins in hospital, where your healthcare team will help you start sitting out of bed, standing and walking as your condition allows.
Once you're home, gentle walking and everyday activities can continue to build your tolerance for movement. Your discharge instructions and treating team will guide you on what is appropriate and how to progress.
There isn't one timeline that suits everyone. Your recovery may depend on your overall health, the reason for surgery, whether you experienced complications and how you're healing.
Your surgeon and cardiac rehabilitation team can guide you on when to introduce more structured exercise.
Start with walking
Walking is often one of the first forms of exercise introduced during recovery — but it's not the only option from early on.
Alongside walking, light resistance movements can often be introduced early in recovery. Simple exercises such as seated leg raises, calf raises or light upper-body movements may be appropriate sooner than many people expect. Early introduction of resistance work — even at very low loads — helps preserve muscle mass and functional strength during a period when the body is at risk of deconditioning.
In the early stages, focus on short, comfortable walks rather than distance or speed. You might find several shorter walks throughout the day more manageable than one longer session.
As your tolerance improves, gradually increase your walking duration before increasing your pace.
A few useful principles:
Start at a comfortable pace where you can still hold a conversation
Increase your duration in small, manageable steps
Allow time to rest between activities
Pay attention to how you feel during exercise and later that day
If you feel unusually fatigued or unwell, reduce your activity and seek advice if symptoms are concerning
Progress doesn't have to happen every day. Some days you may manage more than others, and that's okay.
How should you move while your breastbone heals?
During many CABG procedures, the breastbone (sternum) is divided to access the heart. It is usually secured with surgical wires or other fixation and needs time to heal, often around 6–12 weeks.
It's understandable to feel cautious about moving your arms or upper body during this time. However, sternal healing doesn't necessarily mean avoiding all upper-body movement. Comfortable movement can be encouraged, with appropriate guidance on how to manage loading while the bone heals.
Your surgical team may provide specific instructions based on your procedure and recovery. One practical approach used in cardiac rehabilitation is called Move in the Tube.
What does ‘Move in the Tube’ mean?
Move in the Tube is a way of thinking about how you position your arms during everyday activities.
Imagine a tube running around your torso. When lifting, pushing, pulling or transferring your body weight, try to keep your upper arms closer to your sides rather than reaching far away from your body.
Keeping your arms close shortens the lever arm and can reduce the forces placed across your healing sternum.
For example:
When standing up from a chair, try to use your leg strength rather than pushing through your arms. If you do need your hands for support, keep your elbows closer to your body rather than pushing through widely positioned arms
When lifting a light object, hold it close to your torso rather than reaching out to pick it up
When moving in bed, use controlled movements and follow the techniques taught by your hospital physiotherapist
When performing an activity in front of you, avoid unnecessarily reaching a long way forward if you can bring the task closer
The aim isn't to keep your arms rigidly by your sides. It's to make everyday movement more controlled and comfortable while you recover.
Why use both arms together?
Where practical, using both arms together can help distribute the load more evenly across the chest rather than placing a greater load through one side.
For example, when lifting a light object, holding it centrally with both hands may be more appropriate than carrying a heavier object at arm's length on one side.
Start with light loads, keep the object close to your body and move slowly and smoothly. Avoid sudden, forceful or heavily loaded movements early in recovery.
These principles can help guide movement, but they aren't a substitute for individual advice. Your treating team can help you determine what is appropriate for your healing and circumstances.
When can you return to strength training?
Strength training can help rebuild muscle capacity and support everyday tasks such as carrying shopping, climbing stairs and getting up from a chair.
Preserving muscle mass matters during cardiac recovery. Prolonged inactivity accelerates muscle loss — a process called sarcopenia — which can make everyday tasks harder and slow your return to full function. For this reason, light resistance movements are often introduced early, even while sternal healing is ongoing.
The timing and type of strengthening still matter. In the early stages, your program may focus on comfortable, low-load movements — think seated or standing exercises using body weight or light resistance. More structured resistance training with progressive loading is introduced and advanced when appropriate for your recovery.
Your exercise physiologist or cardiac rehabilitation team can help you consider:
Your sternum and surgical-site healing
The type of exercise and the load involved
Whether you can perform the movement with control and without excessive strain
Your cardiovascular response, symptoms and fatigue
How to gradually increase resistance as your capacity improves
You don't necessarily need to avoid using your arms until your sternum has completely healed. Instead, movement and loading should be progressed appropriately, in line with your surgical team's guidance.
Avoid rushing back to your previous weights or training routine simply because you feel better. Recovery of your energy and fitness doesn't always mean the underlying tissues have finished healing.
How does cardiac rehabilitation help?
Cardiac rehabilitation is a structured program that combines exercise, education and support to help you recover after a cardiac event, procedure or diagnosis.
It can be particularly valuable after bypass surgery, providing guidance on how to return to physical activity while supporting your longer-term cardiovascular health.
Depending on your needs, your program may include:
Aerobic exercise: such as walking or cycling to rebuild cardiovascular fitness
Strength training: introduced and progressed when appropriate
Movement guidance: practical advice on returning to everyday activities and managing your recovery
Symptom monitoring: understanding how you respond to exercise and when to seek advice
Heart health education: support with medication, cardiovascular risk factors and sustainable lifestyle changes
Your program should reflect your medical history, current capacity, symptoms and recovery rather than follow a one-size-fits-all plan.
Cardiac rehabilitation can also help you feel more confident about what you can do, what to progress and when to ask for support.
If you haven't been referred to a program, speak with your GP, cardiologist or treating team about your options.
What if you’re still feeling tired or less fit than before surgery?
Fatigue and reduced exercise tolerance are common during recovery. You may also find that your energy fluctuates from day to day.
This can be frustrating, particularly if you were active before surgery.
Try to think of recovery as a gradual rebuilding process rather than a test of your previous fitness.
A few helpful principles:
Start from where you are now. Your current capacity may be different from what it was before surgery
Build gradually. Increase activity in manageable steps rather than making large jumps in duration or intensity
Allow time to recover. Rest is part of recovery, not a sign that you're doing something wrong
Pay attention to symptoms. New or worsening symptoms should not be ignored
Ask for guidance. If you're unsure how to progress, your cardiac rehabilitation team or exercise physiologist can help
If fatigue or pain is preventing you from becoming more active, discuss this with your healthcare team rather than simply pushing through.
When should you stop exercising or seek medical advice?
Follow the activity and exercise advice provided by your treating team.
Stop exercising and seek medical advice if you experience new or unusual chest discomfort, dizziness, palpitations or breathlessness that is unexpected for your level of activity.
Seek prompt advice if you notice increasing pain around your sternum, new clicking or movement at the breastbone, or concerns about your wound.
Call 000 if you experience severe or persistent chest pain, severe breathlessness or other symptoms that may indicate a heart attack. Do not drive yourself to hospital.
Looking after your heart beyond surgery
Bypass surgery can improve blood flow to the heart, but it doesn't cure the underlying coronary artery disease.
Long-term management remains important and may include prescribed medication, managing cholesterol and blood pressure, healthy eating, avoiding smoking and maintaining regular physical activity.
Exercise is one part of this bigger picture. With appropriate guidance and a plan that suits your needs, it can become a sustainable part of looking after your heart.
How CardioCare Clinic can support your recovery
At CardioCare Clinic, we provide exercise physiology for cardiovascular health, including support for people recovering after cardiac surgery.
Your exercise program can be tailored to your recovery, current fitness, symptoms and goals. We can help you gradually rebuild your exercise capacity, improve strength and develop confidence with movement.
Recovery takes time. You don't have to work through it alone.
*This article is intended for general education and does not replace individual medical advice. Your cardiologist and treating team should guide your care following a cardiac procedure.