Cardiac Rehabilitation: From Screening to Exercise Progression

1. Cardiac rehabilitation is secondary prevention, not just supervised walking

Modern cardiac rehabilitation is a structured, multidisciplinary secondary-prevention programme. Exercise is one major component, but high-quality programmes also address patient assessment, cardiovascular risk factors, nutrition, body composition, psychosocial health, physical activity behaviour and measurable outcomes.

For the physiotherapist, this means the exercise session should sit inside a wider clinical plan. A patient who can cycle for 15 minutes may still need blood-pressure review, education about activity pacing, support for fear of exertion, resistance training, functional goals and coordination with the wider cardiac team.

2. Start with a baseline clinical picture

Before progressing exercise, establish what the person can currently tolerate and what limits them. Review the cardiac diagnosis and procedure history, current symptoms, relevant comorbidities, medications, resting observations, mobility, habitual activity, functional goals and any previous exercise response.

The assessment should answer a practical question: what level of activity can this person perform safely today, and what evidence will tell us that the next dose is appropriate?

• Resting heart rate and blood pressure where clinically indicated.
• Current chest discomfort, breathlessness, palpitations, dizziness, fatigue or unusual exercise intolerance.
• Functional mobility and exercise capacity using an appropriate test for the setting.
• Musculoskeletal limitations that could change the mode of exercise.
• Confidence, fear of exertion and barriers to adherence.
• Medication effects that may alter heart-rate response or symptom interpretation.

3. Aerobic prescription: think FITT plus response

Aerobic exercise prescription can be organized using frequency, intensity, time and type, but the numbers should never be separated from the patient's clinical response. Walking, cycling and other rhythmic large-muscle activities are common choices because intensity can be adjusted and monitored.

Heart rate can be useful, but it is not always sufficient on its own. Rate-limiting medication, rhythm disturbance, autonomic impairment or a poor chronotropic response can make perceived exertion and symptoms especially important.

• Frequency: build regular exposure across the week rather than relying on occasional hard sessions.
• Intensity: use the prescribed clinical target, perceived exertion and symptom response together.
• Time: begin with a tolerable duration; intervals may be useful when continuous exercise is not yet tolerated.
• Type: select a mode the person can perform safely and is likely to continue.

4. Resistance training belongs in cardiac rehabilitation

Resistance exercise can support strength, physical function and independence when appropriately prescribed. The starting load should allow controlled technique and normal breathing without excessive strain. Progression is usually gradual and guided by tolerance, movement quality and the programme's medical criteria.

Teach the patient to avoid breath-holding and unnecessary Valsalva-type straining. The aim is not to reproduce a gym competition environment; it is to rebuild useful strength safely and confidently.

5. Monitoring: what are you actually watching for?

Monitoring is not a ritual. Each variable should help answer whether exercise is being tolerated as expected. Depending on the person and setting, this may include heart rate, blood pressure, rhythm information, oxygen saturation, perceived exertion, dyspnoea and recovery time.

A normal-looking heart rate does not overrule concerning symptoms. New or increasing chest pressure, presyncope or syncope, marked unexplained breathlessness, sustained palpitations, abnormal haemodynamic response or sudden deterioration should trigger reassessment according to the local medical pathway.

6. Progression: change one meaningful variable at a time

A common progression strategy is to establish consistent tolerance first, then increase duration, frequency or intensity according to the goal and clinical response. Increasing every variable together makes it difficult to identify what caused a problem.

For a deconditioned patient, adding several minutes of walking may be more useful than immediately making the same short bout much harder. For someone who already tolerates duration well, intensity or task specificity may become the next priority.

7. Outcome measures should match the goal

• Exercise capacity or walking tests when the goal is endurance.
• Sit-to-stand or other functional tasks when lower-limb function is limiting daily activity.
• Symptoms and perceived exertion at a standardized workload.
• Physical-activity behaviour and confidence, not only supervised-session performance.
• Programme adherence and meaningful patient goals.

8. Clinical reasoning example

A patient after coronary revascularization can walk for 10 minutes but stops because of fear, not because of chest symptoms or physiological intolerance. Simply prescribing more minutes may not solve the real barrier. Education, graded exposure, monitoring feedback and a clear home plan may be more important than changing the exercise mode.

Contrast this with a patient whose exercise is limited by new exertional chest pressure. That presentation requires reassessment rather than motivational coaching or routine progression.

9. Common mistakes

• Treating cardiac rehabilitation as exercise only.
• Using heart rate as the only intensity marker in every patient.
• Progressing load despite new warning symptoms.
• Ignoring resistance training and functional strength.
• Failing to document the patient's actual response and recovery.
• Giving a generic home programme without addressing adherence barriers.

Clinical takeaway

Cardiac rehabilitation is safest and most effective when exercise prescription, monitoring and progression are individualized inside a broader secondary-prevention programme. The therapist should always be able to explain why today's dose is appropriate, what response is expected and what finding would make the plan change.