Some of these influencers include:
Illness - When you suffer from fever, injury, anemia, or infection, your heart rate increases to provide more oxygen throughout the body and for other functions, in response to triggers by the immune system.
Emotional Stress - You have likely heard of the "fight or flight" response. Part of this response to fear or stress is increased heart rate which will return to normal as the stress is reduced.
Physical Exertion - Exercise makes your heart beat faster in a very healthy way, as it works to provide oxygen to the muscles and tissues being worked.
Drugs - Whether prescribed, herbal or illicit, medications and street drugs can cause an unhealthy, rapid heartbeat.
Extreme Temperature - Very cold conditions cause your heart rate to increase to bring more blood to the surface of the skin and warm it. The same can happen in extreme heat.
Glycogen Levels - If your blood sugar level drops, the body will react by quickening pulse, working to fuel muscles and provide energy.
Dehydration - When the body is dehydrated, blood does not move as well within its vessels. Waste builds up in the bloodstream, so the heart pumps faster to flush out those wastes.
Caffeine - Caffeinated beverages and snacks like chocolate coffee beans increase the heart rate.
Alcohol - Drinking alcohol causes blood vessels in the limbs to dilate. This means the heart has to work harder to pump blood to these extended areas. This raises the heart rate.
Smoking - Cigarettes and other nicotine products cause increased heart rate during and shortly after use. Over time, smoking also causes long-term high blood pressure