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Target Heart Rate Calculator

Find your optimal exercise intensity zones

Based on peer-reviewed medical formulas.

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What Is Target Heart Rate?

Target heart rate (THR) is the range of heartbeats per minute that represents the optimal intensity level for cardiovascular exercise. It is typically expressed as a percentage of your maximum heart rate, which is roughly estimated as 220 minus your age. Training within your target heart rate zone ensures that you are working hard enough to improve cardiovascular fitness while avoiding the risks of overexertion. Different zones — fat burning, cardio, and peak — serve different training purposes and produce distinct physiological adaptations.

How to Measure Heart Rate During Exercise

The most common method is to manually check your pulse at the radial artery (wrist) or carotid artery (neck) during a brief pause in exercise. Count the beats for 15 seconds and multiply by 4 to estimate your beats per minute. For more continuous monitoring, a chest strap heart rate monitor or a wrist-based optical sensor on a fitness watch provides real-time feedback. Wearing a heart rate monitor during workouts allows you to stay within your target zone, adjust intensity on the fly, and track your fitness progress over time.

Benefits of Heart Rate Training

Frequently Asked Questions

What is a good target heart rate?
A good target heart rate depends on your fitness goals. For fat burning, aim for 50-60% of your max heart rate. For cardiovascular fitness, 60-80% is ideal. Peak performance zones are 80-90% and are best for short intervals.
How do I check my pulse?
Place your index and middle fingers on your radial artery (inside of wrist, below the thumb) or carotid artery (side of neck). Count beats for 15 seconds and multiply by 4 to get your heart rate in beats per minute.
Should I train in the fat burn zone?
Training in the fat burn zone (50-60% max HR) uses a higher percentage of fat for fuel but burns fewer total calories. Higher intensity zones burn more total calories and can be more effective for overall fat loss. A mix of zones is usually best.
Is higher heart rate better during exercise?
Not necessarily. Exercising at a higher heart rate does not always mean a better workout. Training in the appropriate zone for your goals and fitness level is more effective and reduces the risk of overtraining or injury.
Can my max heart rate be wrong?
The 220 minus age formula is an estimate and can be off by 10-20 beats per minute for some individuals. Factors like genetics, medications, and fitness level can affect your true max heart rate. A supervised stress test gives the most accurate measurement.
How does fitness affect target heart rate?
As you get fitter, your resting heart rate typically decreases and your heart becomes more efficient. This means you may be able to do more work at the same heart rate. Your target zones stay based on max HR, but your performance within those zones improves.

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Calories Burned Calculator — Estimate calories burned during exercise

Heart Rate Zone Calculator — Detailed heart rate zones

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