The normal resting heart rate for adults ranges from 60 to 100 beats per minute. However, the range for most healthy adults is between 55 and 85 beats per minute. Other factors can affect your resting heart rate, such as stress, anxiety, hormones, medication, and physical activity level. Well-trained athletes can have resting heart rates in the 40s, but a heart rate that slow for the average person would be concerning and should prompt a call to a doctors office, especially if they feel weak, lightheaded, or short of breath. On the other end of the scale, a resting heart rate that is consistently above 90 beats per minute is also something a doctor should be aware of. The target heart rate during moderate-intensity activities is about 50-70% of maximum heart rate, while during vigorous physical activity, its about 70-85% of maximum. The maximum heart rate can be calculated by subtracting your age from 220. If you have any concerns about your heart rate, you should talk to your primary healthcare provider.