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Report Summary

For the School’s 2008 Science Fair I decided to do energy drinks and caffeine. I wanted to know if energy drinks really pump up the heart rate and if they do then by how much?  This project does connect to the real world because some people use energy drinks to enhance their sports performance and pump up their heart rate and I wanted to know if they really do. The variables of my experiment were the type of drink the subject drank, and the age of the subject who drank it. The controls were, each subject will drink 250 ml. of a drink, the energy drink will stay the same temperature, and I will use a stopwatch to time their bpm. (Beats Per Minute). Doing this project I learned that energy drinks do work and will have a bigger effect depending on the amount of caffeine in the drink. The more caffeine in the drink, the higher the heart rate will raise. Another thing that I learned doing this project is that next time I have an energy drink I have to be aware of the after effects. Subject B and C both had minor headaches about one hour after drinking the drinks and subject A has muscle tremors. To see the results of my experiment turn to page 6, and to see the graphs go to pages 7, 8, 9.

# Background, Problem, And Hypothesis

I decided to do this project because lots of people drink energy drinks. Even I drink them and so do lots of people on my hockey team and I wanted to know if they work or if they are just an expensive drink.

The problem that I am trying to solve by doing this project is to see if energy drinks can really raise the heart rate to enhance people’s sports performance and if they do then by how much? I also wanted to know if they will have a bigger affect by the amount of caffeine in the drink, the age of the person drinking, or the amount the person drinking it consumes.

I think that the energy drinks that have more caffeine in them are going to have a bigger affect on the heart rate. Also if the person who is drinking is older than it will raise more than a younger person.

# Procedure

I did not use many materials in my project. All of the materials that I used are, two Amp Energy Drink, two Rockstar Energy Drink, two Monster Energy Drink, a stopwatch, and three test subjects. To see the amount of caffeine and sugar in each drink go to page 5.

To do my project, first I started with three test subjects that have different ages and tested their resting heartbeat by placing two of my fingers below the thumb bone on the side of their wrist and timed a stopwatch for one minute. Then I gave each subject 250 ml. of an energy drink. Then I tested their pulse after fifteen minutes, thirty minutes, forty-five minutes, and one hour. I repeated this for three days until each subject had drank each drink.

# Conclusion

In conclusion my hypothesis was correct. Caffeine did raise the heart rate. The drink that had more caffeine in it had a bigger affect. Also the oldest subject in my experiment had a bigger rise in their heart rate. I learned that energy drinks cause minor headaches and muscle tremors. I also learned that energy drinks wear off in less than an hour so if you are playing an hour long sport, and you drink one of these drinks, be prepared to feel tired during the game. So I would recommend not to drinks an energy drink for an hour-long sport, but if you plan to drink one, be sure to drink it right before the game to you’ll have more energy. But by the end of the game be ready for a tired feeling. Or if you want a quick jump of energy at the very start of a game drink one of these drinks about 30-45 minutes before the game. During this project I learned many more things about my project by reading books about the heart and how it works and books about caffeine.

Acknowledgements

I would really like to thank my mom, Robyn Sabit, my brother, Lance Sabit, and my dad, Hilliard Sabit for being my test subjects and helping me a lot for this project. I would also like to thank Mr. Spicer, my homeroom teacher, for helping me out a lot for science fair.

# Results

### Subject: A

Age: 42

Resting Heart Beat: 84 BPM

Drinks:

BPM after 15 minutes

BPM after 30 minutes

BPM after 45 minutes

BPM after 1 hour

### Subject: B

Age: 39

Resting Heart Beat: 72 BPM

Drinks:

BPM after 15 minutes

BPM after 30 minutes

BPM after 45 minutes

BPM after 1 hour

### Subject: C

Age: 15

Resting Heart Beat: 68 BPM

Drinks:

BPM after 15 minutes

BPM after 30 minutes

BPM after 45 minutes

BPM after 1 hour

# Bibliography

Websites:

• Unknown. http://en.wikipedia.org/wiki/Caffeine. 19 Jan. 2008.
• Gavin, Mary. www.howstuffworks.com/caffeine.htm. Oct. 2007.

Books:

• Burgess, Jan. The Heart and Blood. London: Macmillan Education LTD., 1988.
• Llamas, Andreu. Respiration and Circulation. Milwaukee: Gareth Stevens, 1998.
• Perry, Robert. Nicotine and Caffeine. Fredrick, Maryland: Twenty-First Century Books, 1990.