You can measure your own heart rate using an electronic device, such as a wearable activity tracker, pulse oximeter or blood pressure monitor, or manually by feeling for a pulse with two fingers on your wrist.
Outside factors such as air temperature or stressors during the day can influence your heart rate. That’s why medical professionals often recommend patients check their pulse when they first wake up in the morning to get the most accurate reading.
Many other factors can influence heart rate, including illness, stress, emotions and certain types of medicine. Caffeine and dehydration can have an influence as well.
“Most people don’t need to be too concerned if they bump up to 100 every once in a while, especially after exercise,” Weaver says.