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Caffeine Effects on the Cardiovascular System

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Effects of Caffeine on a Person’s Cardiovascular System

INTRODUCTION
Caffeine is a stimulant that makes a person’s heart beat faster (Nunley 2013). This effect of caffeine is usually seen as a negative one and that it hearts your cardiovascular health overall. A lower heart rate, both resting and post exercise, is said to be better if the rate is lower because it puts you at a lower risk of having a stroke or heart disease (Boyles 2002). Having a lower rate is preferred because it means that your heart is working at a slower sped to pump the amount of blood necessary for your body. (Simon 2015) We predicted that people with lower daily caffeine consumption will have lower resting and lower post exercise heart rates.

MATERIALS AND METHODS
We had teams of three. Each person took a tally of their normal caffeine consumption on an average day. Each team took their resting pulse (after waiting until they were sitting down for at least five minutes to make sure our pulse was back to normal resting heart rate) by counting the amount of times they could feel a beat on either their wrist or their neck for a whole 60 seconds. The groups of students then completed the 3-minute step test where they followed the beat of a metronome at 100 bpm on a step that was 12 inches in height. Immediately following the ending of the step test, the students took their pulse once again for an entire 60 seconds. We then took a look at our heart rates compared to the national rankings to see how well we compared. Each team’s results were recorded and shared with the class (Table 1). We analyzed data by calculating the percent change in heart rate, (Pulse Post Step Test- Pulse Pre-Step Test)/ Pulse Pre-Step Test*100, and by preparing graph’s.

RESULTS
I found that there was no particular trend in the data regarding the association of higher heart rate with the people that have

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