Before your first pair of running shoes starts gathering dust or the weight room begins to feel like an insurmountable challenge, there is one simple step worth taking — an exercise stress test. This diagnostic test measures how your heart and circulation adapt to gradually increasing physical exertion. If you have been fairly inactive for six to twelve months or are just starting out, an exercise stress test is a sensible step before drawing up a training plan.
Experts recommend that everyone have an exercise stress test at least once in their lifetime. Even experienced recreational athletes should get checked from time to time — it provides an objective picture of the effects of training and helps prevent surprises. Below, Medihub occupational and sports physiotherapist Pjotr Voronõi answers the most frequently asked questions.
Why an exercise stress test matters
An exercise stress test complements a blood count and a resting ECG. A resting ECG shows how your heart works while you are sitting — an exercise stress test shows what happens when your heart rate rises and your body works harder. The difference between the two can reveal hidden problems: abnormal heart rhythms, an excessively rapid rise in blood pressure and a limited ability to adapt to exertion.
Pjotr Voronõi studied sports physiotherapy at Chemnitz University of Technology in Germany and completed interdisciplinary training as an occupational health specialist at Medihub. He says an exercise stress test is for everyone — beginners, experienced athletes and anyone who simply wants to lead a healthier life. There is no need to feel embarrassed about your fitness level. The primary aim is to assess your heart’s health and functional capacity, not to compare you with anyone else.
What happens during an exercise stress test
Before the test, a doctor reviews your medical information and asks follow-up questions. Your height and weight are measured. Electrodes are attached to your bare upper body, and a blood pressure cuff is placed around your upper arm. A resting ECG is recorded, and your blood pressure and heart rate are measured. The cycle ergometer is then adjusted to fit your body.
The starting workload is usually 25–50 W, with an optimal pedaling cadence of 60–80 revolutions per minute. The workload increases by 25–50 W every 2–3 minutes. Before each increase, your blood pressure is measured and you are asked how hard the effort feels. The test continues until you reach fatigue or the target heart rate. Afterward, you continue pedaling gently for five minutes while your blood pressure and heart rate recovery are monitored. The entire assessment, including the consultation, takes about an hour.
There are two types of exercise stress test: maximal and submaximal. For the average person, a submaximal test is sufficient. This means reaching around 70–85% of your maximum heart rate — a noticeable but not excessively strenuous effort. Well-trained athletes are offered a separate maximal-effort test.
An exercise stress test with lactate measurement deserves a separate mention. For this test, a small drop of blood is taken from your earlobe before the test and around four times during it to measure the concentration of lactic acid (lactate). Lactate provides an objective measure of metabolism and muscle efficiency — it allows for considerably more precise training recommendations than a standard test.
How to prepare for the test
- Wear comfortable sportswear — a short-sleeved shirt and shorts or leggings. If you have cycling shorts, bring them along.
- Wear shoes suitable for cycling.
- Bring a towel to dry yourself off.
- Eat 1.5–2 hours before the test. Drinking water is allowed.
- Avoid smoking (including e-cigarettes) for a full day before the test.
- If possible, bring a previous ECG and the results of any earlier heart examinations or exercise stress tests.
- Avoid strenuous physical exertion the day before the test. Light activity is allowed.
- Arrive at least 15 minutes early so you have time to get changed without rushing.
After the test, a sports medicine physician reviews the ECG results and assesses your exercise tolerance and heart function. A sports physiotherapist provides training and lifestyle advice — you receive personalized heart rate zones for safe training and endurance development, along with recommendations for improving your cardiovascular health.
Exercise stress test FAQs
Is an exercise stress test suitable for beginners?
Yes. It is even more useful for beginners than for experienced athletes — you receive individual training recommendations based on your results and can start safely without harming yourself.
How often should you repeat an exercise stress test?
If you train regularly with specific goals in mind, it makes sense to take the test about once a year. This gives you an objective view of how your fitness is progressing and whether your heart can cope with your training volume.
Do I need to be fit before taking an exercise stress test?
No. Your general fitness level does not matter at the outset — the aim is to assess your heart health, not your athletic performance. The result is a starting point, not a grade.
Author: Medihub
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