Factors That Affect One's Heart Rate

1. Drinking coffee: It affects the central nervous system and metabolism
2. Listening to Different Types Of Music: http://www.telegraph.co.uk/news/uknews/2569640/Music-can-boost-your-immune-system.html <-- According to this link, listening to different music can corroborate the immune system and makes you less vulnerable to disease.
3. Dehydration: Your heart heart rate increases. It affects the Cardiovascular System and also impacts the central nervous system and metabolic system.
4. High temperatures: Your heart rates increase