What is an exercise stress test? 

An exercise stress test (also known as an exercise ECG) assesses how your heart performs under physical activity. It measures your heart rate, rhythm, and blood pressure while you walk or jog on a treadmill (or occasionally cycle on a stationary bike).

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This test helps your doctor evaluate:

• The cause of exercise-related symptoms such as chest pain, shortness of breath, dizziness, or fatigue

• Whether it is safe to start or resume exercise after a heart event (e.g. heart attack)

• The presence of coronary artery disease or ischaemia (reduced blood flow to the heart)

• Signs of congestive heart failure

• The presence or progression of arrhythmias (irregular heart rhythms)

• Or to exclude these conditions if symptoms are unexplained

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Your test will be supervised by a doctor and trained cardiac technician, who will closely monitor your ECG and blood pressure throughout the procedure.

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What to expect during the exercise ECG test 

You’ll be asked to undress to the waist (ladies may keep their bra on) so the technician can attach ECG electrodes to your chest and a blood pressure cuff to your arm.

 

The test begins with gentle exercise, gradually increasing in intensity under continuous monitoring. The doctor will stop the test when you reach your target heart rate, experience certain symptoms, or when sufficient information has been gathered. After exercise, your recovery phase will also be monitored for a few minutes.

 

Our specialist cardiologist, Dr Gerald Yong, will later review your ECG, blood pressure readings, and reported symptoms to determine your exercise capacity and identify any areas of concern. A full report will be sent to your referring doctor, including recommendations for any further assessment or treatment if needed.

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How do I prepare for an exercise ECG?

• Unless otherwise advised, continue your regular medications and bring a list of them (including doses and timing).

• Avoid heavy meals, caffeine, and nicotine for at least 2 hours before the test.

• Wear a two-piece outfit and comfortable rubber-soled shoes suitable for walking or light jogging.

• Men may need a small area of chest hair shaved to allow electrode contact; this will be done at your appointment if required.

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How long does an exercise ECG take?

Please allow around 40 minutes for your appointment, with the exercise portion lasting up to 20 minutes.

 

Arrive 15 minutes early to allow time for check-in.

 

The test will be stopped if:

• Your blood pressure rises or drops excessively, or ECG changes occur

• Irregular heart rhythms (arrhythmias) or signs of restricted blood flow (stenosis) are detected

• You experience chest pain, dizziness, weakness, nausea, or excessive sweating

• You reach your target heart rate (85% of your predicted maximum for age)

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