Your target heart rate during exercise depends on your age, fitness level, and the intensity of your workout. Here are some general guidelines based on the search results:

• Moderate-intensity physical activity: For moderate-intensity physical activity, your target heart rate should be between 64% and 76% of your maximum heart rate. 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: 109 bpm to 129 bpm.

• Vigorous-intensity physical activity: For vigorous-intensity physical activity, your target heart rate should be between 77% and 93% of your maximum heart rate. 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: 142 bpm to 172 bpm.

• Starting out: If you are just starting an exercise routine, you may want to start out at 60% to 70% of your target heart rate. As you become more fit, you may want to progress to 70% to 80% of your target heart rate.

• Checking your heart rate: To check your heart rate, find your pulse (inside your wrist, on the thumb side, is a good place) and count the number of beats in a minute. Alternatively, you can take your pulse for 30 seconds and double it. Your resting heart rate is the number of times your heart beats per minute when you’re at rest. A good time to check it is in the morning after you’ve had a good night’s sleep, before you get out of bed or grab that first cup of coffee.

Its important to note that certain medications can lower your heart rate response, so be sure to talk with your doctor if you have any questions.