How to Prepare for a Stress Test and What to Expect

A stress test is one of the most important tools doctors use to evaluate how your heart works under pressure. By measuring how your heart responds to exercise (or medication that mimics exercise) a stress test can detect hidden signs of heart disease before symptoms appear.

Preparing properly ensures the test is both safe and accurate. Below, we’ll walk you through the different types of stress tests, how to prepare for each, and what to expect before, during, and after your exam.

What Is a Stress Test?

A stress test monitors your heart rate, blood pressure, breathing, and electrical activity (ECG) while your heart is working harder than usual.

There are a few different types of stress tests:

• Treadmill Stress Test: You walk or jog on a treadmill while your heart is monitored.
• Nuclear Stress Test: A safe, small dose of radioactive tracer highlights blood flow to your heart.
• Pharmacological Stress Test: Special medications mimic the effects of exercise if you’re unable to walk or run.

Your doctor will recommend the type of stress test that best fits your health, age, and mobility. If you’re unsure, ask your care team which test you’ll be having so you can prepare the right way.

How to Prepare for a Stress Test

Preparation may differ depending on the test type, but some guidelines apply across the board:

• Avoid food, caffeine, and certain medications as instructed by your doctor.
• Wear comfortable shoes and clothing suitable for exercise.
• Bring a list of your current medications to review with your care team.
• Always follow your doctor’s personalized instructions for the best results.

“Many patients feel anxious before their first stress test, but once they understand how straightforward and safe it is, that stress melts away,” explains Dr. Swathi Kolli. “Preparation is the best way to ensure we get accurate results and keep patients comfortable throughout the process.”

How to Prepare for a Treadmill Stress Test

During this test, you’ll walk or run on a treadmill while your heart function is monitored. To prepare:

• Avoid heavy meals for 2–3 hours before your test.
• Wear athletic shoes and loose, breathable clothing.
• If you’re not used to exercise, try some light walking in the days leading up to your test.

How to Prepare for a Nuclear Stress Test

This test uses a tracer to create detailed images of your heart. To prepare:

• Avoid caffeine (coffee, tea, chocolate, soda, and even decaf) for at least 24 hours before the test.
• Some heart or breathing medications may need to be paused, only do this under your doctor’s direction.
• Bring an up-to-date list of your prescriptions and supplements.

How to Prepare for a Pharmacological Stress Test

If you can’t exercise, this test uses medication to make your heart beat as if you were working out. To prepare:

• Avoid caffeine for at least 24 hours before your appointment.
• Certain prescriptions may need to be held (only with your doctor’s guidance).
• Tell your care team about all medications you take and any other medical conditions.

What to Expect During the Test

Here’s what typically happens:

• Electrodes are placed on your chest to monitor your heart.
• You’ll either exercise or receive medication that raises your heart rate.
• Your care team will closely observe your heart rhythm, blood pressure, and breathing.
• Most stress tests take 30–60 minutes.
• Your safety is the top priority, and trained professionals monitor you at every step.

What to Expect After the Test

Your doctor will usually review results the same day or shortly afterward. 

Most patients can return to normal activities right away unless advised otherwise. Some mild fatigue or muscle soreness can occur after treadmill-based tests.

Stress Tests Are Simple and Safe: Here’s How We Can Help

Stress testing is a safe, effective way to uncover hidden cardiovascular problems and protect your long-term heart health. With early detection, your care team can intervene before serious complications develop.

The Cardiovascular Center of Florida combines advanced technology with compassionate care to give patients peace of mind. 

Our experienced cardiologists provide a full spectrum of diagnostic and treatment options, including treadmill, nuclear, and pharmacological stress testing, so you can feel confident you’re in the right hands.

Ready to take the next step in protecting your heart? Schedule your stress test today.