Treadmill stress test (TMT)
An ECG recorded while you walk on a treadmill that gets progressively faster and steeper, to see how the heart behaves when it is asked to work hard rather than at rest.
- How long
- About 45 minutes in total
- Preparation
- Light meal, comfortable shoes
- Does it hurt
- Physical exertion, as with brisk walking uphill
- Results
- Usually discussed the same day
What happens
- 01
Electrodes are attached and a resting ECG and blood pressure are recorded
This is the baseline every later reading is compared against. A doctor is present throughout the test.
- 02
You begin walking on a slow, gentle incline
The first stage is deliberately easy. Hold the rail lightly for balance rather than leaning on it, since taking weight through the arms alters the workload.
- 03
Speed and gradient increase every three minutes
ECG and blood pressure are recorded at each stage. You will be asked how you feel as you go.
- 04
The test stops and you are monitored while recovering
It ends when you reach the target heart rate, when you need to stop, or if the doctor sees a reason to stop. Recovery monitoring for several minutes afterwards is part of the test, not an afterthought.
What it shows
- ECG changes appearing under exertion that were absent at rest, suggesting the heart muscle is not getting enough blood when demand rises
- Exercise capacity, which is a strong indicator of prognosis in its own right
- The blood pressure response to exercise, including an abnormal fall
- Whether symptoms are reproduced by exertion, and at what workload
- Rhythm disturbances that appear only with exercise
- How quickly the heart rate recovers after stopping
What it cannot tell you
- It is less accurate in people who cannot walk far enough for other reasons — knee, hip, or lung problems — because an inadequate workload cannot be interpreted.
- Both false positives and false negatives occur. It is more reliable in people whose symptoms already suggest coronary disease than as a blanket screening test in people without symptoms.
- It indicates that blood supply is inadequate somewhere. It does not show which artery is involved or how tight the narrowing is; that needs imaging or angiography.
- It is not suitable in unstable chest pain, in a recent heart attack, or in severe aortic valve narrowing.
How to prepare
- Eat something light two hours before. Neither a heavy meal nor an empty stomach.
- Wear comfortable shoes you can walk properly in, and loose clothing. This is the preparation people most often get wrong.
- Avoid tea, coffee and tobacco for a few hours beforehand.
- Ask specifically whether to take your usual medicines — beta blockers in particular limit the heart rate and can make a test uninterpretable, but never stop a prescribed medicine without being told to.
- Bring previous stress tests, ECGs and angiogram reports.
Book a consultation
Tests are arranged after an assessment, so that each one is answering a question that matters in your case.
- Clinic
- 13, Ground Floor, M.K. Plaza, Hospital Road, near Madhav Dispensary
Gwalior 474001
Directions - OPD hours
- Monday to Saturday
12:30–2:30 pm, 5:30–6:30 pm
Closed Sunday - In an emergency
- Do not use this site. Call 108 for an ambulance or go to the nearest emergency department.