Exercise Stress Test (cont.)

What If I have Diabetes?

  • If you take insulin to control your blood sugar, ask your doctor what amount of your medication you should take the day of the test. Often, you will take only half of your usual morning dose and eat a light meal 4 hours before the test.
  • If you take pills to control your blood sugar, do not take your medication until after the test is complete.
  • Do not take your diabetes medication and skip a meal before the test.
  • If you own a glucose monitor, bring it with you to check your blood sugar levels before and after your exercise stress test. If you think that your blood sugar is low, tell the lab personnel immediately.
  • Plan to eat and take your blood sugar medication following your stress test.

What Should I Wear the Day of the Test?

On the day of your stress test, wear soft-soled shoes suitable for walking and comfortable clothes. Do not bring valuables.

What Happens During the Exercise Stress Test?

First, during a stress test, a technician will gently clean 10 small areas on your chest and place electrodes (small, flat, sticky patches) on these areas. The electrodes are attached to an electrocardiograph monitor (ECG or EKG) that charts your heart's electrical activity during the test.

Before you start exercising, the technician will perform an EKG, to measure your heart rate at rest and will take your blood pressure.

You will begin to exercise by walking on a treadmill or pedaling a stationary bicycle. The rate of exercise, or degree of difficulty will gradually increase. You will be asked to exercise until you feel exhausted.

At regular intervals, the lab personnel will ask how you are feeling. Please tell them if you feel chest, arm or jaw pain or discomfort, short of breath, dizzy, lightheaded, or any other unusual symptoms. It is normal for your heart rate, blood pressure, breathing rate, and perspiration to increase during the test. The lab personnel will watch for any symptoms or changes on the ECG monitor that suggest the test should be stopped.

After the test you will walk or pedal slowly for a couple of minutes to cool down. Your heart rate, blood pressure and ECG will continue to be monitored until the levels begin returning to normal.

Although the appointment lasts about 60 minutes, the actual exercise time is usually between seven and 12 minutes.

Ask your doctor if you have any questions about the exercise stress test.

SOURCES:

Reviewed by Robert J Bryg, MD on January 24, 2008

Portions of this page © Cleveland Clinic 2008


Last Editorial Review: 1/12/2010

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