Dopamine in movement. A part of the brain called the basal ganglia regulates movement. Basal ganglia in turn depend on a certain amount of dopamine to function at peak efficiency. The action of dopamine occurs via dopamine receptors, D1-5. Dopamine reduces the influence of the indirect pathway, and increases the actions of the direct pathway within the basal ganglia.
In general terms, your THR is 60-80% of your maximum heart rate. You can either estimate what your THR is based on your age, or calculate it effectively by using the Karvonen or Zoladz method. Whichever way you do it, remember the THR is measured in beats per minute (bpm).
How to Manually Check Your Heart Rate. A normal resting heart rate for most adults is between 60 and 100 beats per minute. Conditioned athletes typically have resting heart rates closer to 60 beats per minute. If your resting heart rate is greater than 100 beats per minute -- or less than 60 and you are not an athlete -- visit your doctor, who can diagnose any underlying condition you might have.