Preparing for stress test
Informed by recognized medical guidance
Overview
A stress test (also called an exercise electrocardiogram or exercise tolerance test) is a medical test that checks how well your heart works when it is pumping fast. It usually involves walking on a treadmill or riding a stationary bike while your heart’s electrical activity is recorded.
Key facts
- A stress test helps to see if your heart gets enough blood when you are active.
- The test is safe and performed by trained healthcare professionals.
- You may be asked to stop taking certain medicines before the test – always follow your doctor’s advice.
Yes, stress tests are a common diagnostic tool used to help diagnose heart problems such as coronary artery disease.
The test is often recommended for people who have symptoms like chest pain or shortness of breath, or who have risk factors for heart disease, such as high blood pressure, high cholesterol, diabetes, smoking, or a family history of heart conditions.
Symptoms
- Chest pain that lasts more than a few minutes or spreads to the arm, back, neck, or jaw
- Sudden shortness of breath with no clear cause
- Fainting or near-fainting
- Rapid or irregular heartbeat that does not settle
- ⚠New or worsening chest pain when you are resting
- ⚠Persistent nausea, sweating, or lightheadedness without a clear reason
Common symptoms
- Chest pain or discomfort (angina)
- Shortness of breath during physical activity
- Irregular heartbeat (palpitations)
- Dizziness or lightheadedness
- Unexplained fatigue
Symptoms in children
- Chest pain, fainting during exercise, or heart murmurs may lead a doctor to recommend a stress test for a child.
Symptoms in older adults
- Older adults may have more subtle symptoms such as general weakness, confusion, or a feeling of indigestion during activity.
Causes
Main causes
- A stress test is not caused by a disease – it is a test done to find the cause of heart-related symptoms.
- Reasons for having a stress test include suspected coronary artery disease, checking if treatment is working, or assessing your heart before surgery.
Risk factors
- High blood pressure
- High cholesterol
- Diabetes
- Smoking
- Family history of heart disease
- Being overweight or physically inactive
When to see a doctor
See a doctor urgently if:
- If you experience any of the emergency symptoms listed above, call your local emergency number immediately.
Book a routine appointment if:
- Make an appointment with your doctor if you have ongoing chest pain, shortness of breath on exertion, or palpitations that worry you.
- If you have been told you need a stress test, follow your doctor’s instructions on how to prepare.
Diagnosis
A stress test is one way doctors diagnose heart problems. They will also take your medical history, listen to your heart, and may check your blood pressure and cholesterol.
Tests that may be done
- Exercise stress test (walking on a treadmill or pedalling a stationary bike while your heart's electrical activity is monitored)
- Stress echocardiogram – an ultrasound of your heart before and after exercise
- Nuclear stress test – a small amount of radioactive dye is injected to see blood flow in your heart
- Pharmacologic stress test – if you cannot exercise, a medicine makes your heart work as if you were exercising
What to expect at your appointment
For a standard treadmill stress test: wear comfortable clothes and walking shoes. Do not eat a heavy meal for 2 hours before. Ask your doctor whether you should take your usual medicines. During the test, sticky patches (electrodes) will be placed on your chest and a blood pressure cuff on your arm. You will start walking slowly, and the speed and incline will increase. The test usually lasts about 10 minutes. Tell the staff if you feel chest pain, dizziness, or extreme shortness of breath.
Treatment
The stress test itself does not treat anything – it helps your doctor decide if you need treatment. If the test shows your heart is not getting enough blood, your doctor may recommend lifestyle changes, medicines, or a procedure to open blocked arteries.
Self-care at home
- Before the test, follow preparation instructions carefully – no smoking, no heavy meals, and avoid caffeine on the day of the test.
- After the test, drink water and rest if you feel tired.
Medical treatments
If your stress test reveals a problem, your doctor might suggest healthy eating, regular exercise, quitting smoking, and managing blood pressure and cholesterol. In some cases, they may recommend medicines such as blood thinners or medicines to control chest pain. Always take any prescribed medicines exactly as directed by your healthcare provider.
When is surgery considered?
If your test shows severe blockages, your doctor may discuss procedures like angioplasty (opening a blocked artery with a small balloon) or bypass surgery. Your doctor will explain the risks and benefits of any procedure.
Living with this condition
After your stress test, your doctor will give you results and a plan. If your heart is healthy, continue with your usual activities and follow heart-healthy habits. If you have a condition, follow your treatment plan and attend follow-up appointments.
Lifestyle tips
- Quit smoking – it is the single best thing you can do for your heart.
- Maintain a healthy weight.
- Manage stress with relaxation techniques or hobbies.
- Get enough sleep (7-9 hours per night).
Diet and exercise
Eat plenty of fruits, vegetables, whole grains, and lean protein. Limit salt, sugar, and unhealthy fats. Aim for at least 150 minutes of moderate exercise each week, like brisk walking, after checking with your doctor.
Mental health and emotional wellbeing
Worrying about your heart health can cause anxiety. It is important to talk about your feelings with your doctor, family, or a counsellor. If you feel overwhelmed, remember that support is available – you are not alone.
Prevention
You cannot always prevent conditions that lead to a stress test, but you can lower your risk of heart disease with a healthy lifestyle.
Screening programmes
If you have risk factors for heart disease, your doctor may recommend regular blood pressure and cholesterol checks. A stress test is only done when you have symptoms or a high risk.
Complications
If left untreated
- If a heart condition found by the stress test is not treated, it can lead to worsening angina, a heart attack, or heart failure.
Long-term outlook
The outlook is generally very good when heart problems are found early. Lifestyle changes and treatments can greatly improve your quality of life and reduce the risk of serious events. Most people who need a stress test go on to live full, active lives.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Guidance may differ by country or region. Confirm local recommendations with a qualified healthcare provider.