Max heart rate (in English: Max Heart Rate, abbreviated MHR) is the highest number of heartbeats per minute that your heart can reach during intense physical exertion. It is an important physiological indicator that shows how your heart responds to the stress of physical activity.

Max heart rate differs from resting heart rate: it is reached only at the highest effort levels and can vary from person to person depending on age, fitness level, and health status.

MHR is a key indicator of how your heart and body respond to intense workload and what your cardiovascular health is like. It is commonly used in sports and fitness for:

1. Determining training intensity: Max heart rate is important for planning workouts and regulating effort. By tracking the percentage of your MHR, you can train in specific “heart-rate zones” for more effective results.
2. Assessing cardiovascular fitness: During training, percentages of max heart rate are used to evaluate endurance and the heart’s efficiency.
3. Safety control: Knowing your MHR helps you avoid overexertion, which can be risky for your health.

There are several ways to calculate and measure max heart rate:

1. Classic calculation formula

The most commonly used formula for estimating max heart rate is:

MHR = 220 − your age

For example, if you are 30 years old, your max heart rate would be:

220 − 30 = 190 beats per minute (bpm)

This formula is quick and easy, but it is not always accurate because it does not account for individual factors such as fitness level or health status.

2. More accurate methods using physical exertion

Max heart rate can also be measured via a stress test or an exercise test under the supervision of a specialist or sports physiologist. This involves performing high-intensity physical activity (for example, on a treadmill or stationary bike) while monitoring heart rate using a heart-rate monitor or an electrocardiogram (ECG). These methods provide a more precise MHR measurement but require specialized equipment.

3. Smartwatches and fitness trackers

Many modern smartwatches and fitness trackers—such as Garmin, Apple, Fitbit, and others—offer real-time heart-rate tracking and can help you determine your max heart rate during workouts.

Your MHR is an individual metric that varies with age, fitness level, and health. Knowing your max heart rate matters because you can use it to optimize training by working in different heart-rate zones.

Heart-rate zones and what they mean:

1. Zone 1 (50–60% of MHR) – Light activity, suitable for warm-ups, recovery workouts, or beginner cardio.
2. Zone 2 (60–70% of MHR) – Moderate intensity, suitable for endurance, improving aerobic capacity, and fat burning.
3. Zone 3 (70–80% of MHR) – Higher-intensity training that improves the cardiovascular system and muscular endurance.
4. Zone 4 (80–90% of MHR) – Intensive activity for advanced athletes, suitable for training around competition intensity.
5. Zone 5 (90–100% of MHR) – Maximum effort, used only for short periods during high-intensity workouts.

It’s important to note that excessive training beyond these zones can be dangerous, especially if you lack experience or adequate physical preparation.

Max heart rate is genetically determined and naturally decreases with age, which means it cannot be “increased.” However, your cardiovascular endurance and efficiency when working close to max heart rate can improve with regular training. Here are some ways:

1. Cardio training – Activities such as running, cycling, swimming, and interval training can improve your ability to work at higher heart-rate levels without fatiguing quickly.
2. High-intensity interval training (HIIT) – Short, intense work intervals followed by rest. HIIT can improve both aerobic and anaerobic endurance and enhance how your body responds to efforts near MHR.
3. Regular heart-rate monitoring – Using fitness trackers or heart-rate monitors helps you understand how your body responds to different workouts and adjust your training plan more effectively.
4. Balance between training and rest – Improving cardiovascular fitness depends not only on intense training but also on recovery time. Give your body enough time to recover after hard sessions.
5. Healthy lifestyle – Proper nutrition, hydration, good sleep, and stress management are essential for maintaining a healthy heart rhythm.

Max heart rate is an important indicator that plays a key role in managing physical training and improving cardiovascular health. By knowing your MHR and using it to work in different heart-rate zones, you can optimize your workouts, increase endurance, and train more safely. Although MHR is genetically determined and declines with age, the right approach to physical activity will help you work effectively within this limit and improve your overall health.