How high should your heart rate be while exercising

Sustaining a workout at this pace improves cardiorespiratory endurance. So knowing your target heart rate helps you pace your workouts. Exercising at the right level of intensity will help you avoid burning out or wasting time with a workout that’s not vigorous enough to help you meet your goals.

Help your heart work stronger

Cardiovascular exercise (also called aerobic exercise) is especially effective in keeping your heart healthy and reaching your target heart rate. This specific type of exercise gets your heart beating fast for several minutes at a time.

Target heart rate is defined as the minimum number of heartbeats in a given amount of time in order to reach the level of exertion necessary for cardiovascular fitness, specific to a person’s age, gender, or physical fitness.

The following is an estimate given by the American Heart Association for target heart rate numbers for adults ages 45 to 70:

• 45 years: 88 to 149 beats per minute
• 50 years: 85 to 145 beats per minute
• 55 years: 83 to 140 beats per minute
• 60 years: 80 to 136 beats per minute
• 65 years: 78 to 132 beats per minute
• 70 years: 75 to 128 beats per minute

Measure your heart rate

To determine your heart rate, use your first two fingers to press lightly over the blood vessels on your inner wrist—the side by your thumb. Count your pulse for ten seconds and multiply this number by six.

If your heart rate is 50 to 85 percent of your maximum heart rate, you have hit your target heart zone and are working at the right level of intensity.

Wearing a multifunctional fitness tracker such as the Fitbit, or Nike+ FuelBand SE, does the work for you. The device is worn like a bracelet or watch and measures your heart rate.

Exercising at the right level of intensity improves heart and respiratory endurance and helps keep your workout at a level that is vigorous enough to meet your health goals.

A final note

If you have a heart condition, be sure to discuss your target heart rate with your doctor prior to beginning an exercise program.

One way of checking physical activity intensity is to determine whether your pulse or heart rate is within the target zone during physical activity.1

For moderate-intensity physical activity, your target heart rate should be between 64% and 76%1,2 of your maximum heart rate. You can estimate your maximum heart rate based on your age. To estimate your maximum age-related heart rate, subtract your age from 220. For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 50 years = 170 beats per minute (bpm). The 64% and 76% levels would be:

• 64% level: 170 x 0.64 = 109 bpm, and
• 76% level: 170 x 0.76 = 129 bpm

This shows that moderate-intensity physical activity for a 50-year-old person will require that the heart rate remains between 109 and 129 bpm during physical activity.

For vigorous-intensity physical activity, your target heart rate should be between 77% and 93%1,2 of your maximum heart rate. To figure out this range, follow the same formula used above, except change “64 and 76%” to “77 and 93%”. For example, for a 35-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 35 years = 185 beats per minute (bpm). The 77% and 93% levels would be:

• 77% level: 185 x 0.77 = 142 bpm, and
• 93% level: 185 x 0.93 = 172 bpm

This shows that vigorous-intensity physical activity for a 35-year-old person will require that the heart rate remains between 142 and 172 bpm during physical activity.

Generally, to figure out whether you are exercising within the target heart rate zone, you must briefly stop exercising to take your pulse. You can take your pulse at your neck, wrist, or chest. We recommend the wrist. You can feel the radial pulse on the artery of the wrist in line with the thumb. Place the tips of the index and middle fingers over the artery and press lightly. Do not use the thumb. Take a full 60-second count of the heartbeats, or take for 30 seconds and multiply by 2. Start the count on a beat, which is counted as “zero.” For example, if this number falls between 109 and 129 bpm in the case of a 50-year-old person, he or she is active within the target range for moderate-intensity activity.

1. Deborah Riebe, Jonathan K Ehrman, Gary Liguori, Meir Magal. Chapter 6 General Principles of Exercise Prescription. In: ACSM’s Guidelines for Exercise Testing and Prescription. 10th Ed. Wolters Kluwer/Lippincott Williams & Wilkins, Philadelphia, PA: 2018, 143-179.
2. Physical Activity Guidelines Advisory Committee [PDF-4.6MB]. Physical Activity Guidelines Advisory Committee Report, 2008. Washington, DC: U.S. Dept of Health and Human Services; 2008.

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Page last reviewed: June 3, 2022

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