1. Sit down and rest for five minutes. 

2. Place your index and middle fingers on the inside of your wrist, below the base of your thumb. 

3. Count the number of beats you feel for 15 or 30 seconds. 

4. Multiply the number of beats by four or two, respectively.

A normal resting heart rate is between 60 and 100 bpm, but most healthy adults have a resting heart rate below 90 bpm. A lower resting heart rate is generally better.