According to Julia Bodeeb in an article on livestrong.com, people who consume caffeine excessively typically experience an increase in heart rate because it serves as a stimulant for the central nervous system. She also mentions that an increased heart rate becomes stressful for the entire body which could lead to other complications. An increased heart rate could be damaging to the heart because it forces the heart to act differently than it normally does. Her article mainly focuses on the long term damages to the entire body as a result of an increased heart rate from excessive caffeine consumption.