Many people do return to physically demanding work after a cardiac arrest, but it generally takes longer than returning to a sedentary role, and a phased return with gradual increase in activity is usually advisable. Your cardiologist needs to be involved before you return to strenuous physical work.
If you have had an ICD fitted, there are additional considerations. Some industrial or manual environments involve equipment that generates strong electromagnetic fields — certain welding equipment, large motors, and power generation machinery can interfere with ICD function. Your device clinic can advise on what is and is not safe in your specific workplace. This does not rule out physical work, but it does need assessment.
An occupational health referral is particularly important for physically demanding roles. Your occupational health adviser can assess the specific risks of your job, recommend appropriate adjustments or restrictions, and liaise with your employer on a safe return-to-work plan. Some roles may require temporary redeployment while recovery continues. Our page on returning to work after cardiac arrest has further guidance.