This document describes an experiment conducted to study the effects of caffeine on heart rate. Three students measured their resting heart rate and then consumed either a caffeinated beverage (Coca-Cola) or non-caffeinated beverage (apple juice). They recorded their heart rate every 5 minutes and found that the caffeinated drink caused a greater increase in heart rate compared to the non-caffeinated drink, with peaks occurring around 9-17 minutes after consumption and returning to resting rate around 23 minutes. The results support the hypothesis that caffeine consumption increases heart rate.

1. INFORMATION AND
COMMUNICATION TECHNOLOGY
IN SCIENCE
(SSI 3013)
DATA LOGGING
(CAFFEINE & HEART RATE)
MEMBERS:
1) SITI ASILAH BT. ABDUL RAHMAN
(D20101037529)
2) NOORUL SYAFAWANI BT MOHAMED
(D20101037511)
3) MAISARAH BT. MOKHAR (D20101037505)

2.  Data logging used in scientific experiments and in
monitoring systems
 Need to collect information faster than a human
 Information accuracy is essential

3. Example :-
Temperatures,
Sound frequencies,
Vibrations,
Times,
Light intensities,
Electrical currents,
Pressure and
Changes in states of matter.

4. ENGAGE
Most of drinks contained caffeine.
Caffeine is known as substance that can affect heart rate.
How caffeine can affect the heart rate?
Is caffeine harmful or benefits?

5. EMPOWER
TITLE
 How Caffeinated and Non-Caffeinated Beverages
Affect Heart Rate
OBJECTIVE
 To observe the effect of caffeinated carbonated soft
drinks on heart rates versus the effect of a non-
caffeinated soft drink.

6. HYPOTHESIS
 The heart rate of a person who drinks the
caffeinated drink will rise significantly, but the heart
rate of the person who drinks the non-caffeinated
drink will remain constant
APPARATUS
 Computer, sensor
MATERIALS
 One can of caffeinated coke, one apple juicebox.

7. PROCEDURES
 Measure heart rate, by using sensor
 The graph of the heart beat is shown on the computer.

8.  Drink a can of either caffeinated soft drink as
quickly as possible for best results. Record the time
you started drinking the soft drink.
 Remain as still as possible for 5 minutes in order to
not affect heart rate with physical activity.
 The heart beat is then measure for every 5 minutes.
 Record the result in a table.
 Repeat the experiment with a can of non-
caffeinated soft drink

9. RESULT

10. CAFFEINE FREE ( APPLE JUICE)

11. CAFFEINATED (COCA-COLA)

12. GRAPH

13. QUESTION
 Q: Difference between resting heart rate and the
highest heart rate after drinking the soft drink
A: 32
 Q: Number of minutes after finishing the drink when
the heart rate reached its peak
A: 9, 17
 Q: Number of minutes after finishing the drink when
the heart rate returned to resting rate
A: approx. 23

14.  Q: Could you drink some amount of caffeinated soft drink
without any effect on your heart rate?
A: Drinking a small amount of caffeine probably affects your
heart rate but not enough for any obvious change in heart
rate.
 Q: What do you see in the comparative results?
A: The caffeinated drink clearly increased the heart rate more
from resting than the non-caffeinated drink.
 Q: What would happen if you drank a large amount of
caffeinated soft drink?
A: Depending on how large the amount, the heart rate could
increase to a dangerous level. The greater the amount you
drink, the faster the heart rate.

15.  Q: Mountain Dew is marketed in the US as a product with caffeine
and in Canada it does not. Why are the marketers releasing two
formats of this soft drink?
A: Marketers release two formats because, in Canada, dark colored
soft drinks, such as Coke and root beer, are the only drinks that can
contain caffeine in regulation with Health Canada.
 Q: Design an investigation to determine how the amount, or dose, of
caffeine affects your heart rate.
A: Have one person drink a decaffeinated drink, another drink half a
can of a caffeinated version of the same drink, and another to drink a
whole can and measure heart rate regularly after to see the
difference.

16. ENHANCE
 Many of us feel like we cannot function without our
first cup of coffee in the morning.
 Caffeine the main ingredient found in coffee is a
stimulant.
 Heart rate increase, pupils dilate, and muscles
tighten up.
 Injects adrenalin into your system to give you a
boost and make you feel good.

17. CAFFEINE FOR PLANT
 Caffeine not only for human but also for plant.
 Caffeine helps plant to grow faster.
 This is because there is nitrogen in coffee.

18. CAFFEINE IN PLANT
 Plants produce its own caffeine for defense.
 Caffeine that comes from plants, provide an
insecticidal, and antimicrobial barrier.
 Caffeine paralyzes and kills some of the insects
that feed on the plant, as well as causing
sometimes-severe intestinal discomfort to grazing
herbivores.

19. REFERENCES
 Chris Chenoweth. Caffeine - Benefits and Risks (2006). Access from
http://www.disabledworld.com/artman/publish/caffeine.shtml#ixzz2Di9V
Ykwk
on November 26, 2012.
 Charlene Collins. Is Coffee Helpful to Relieve an Asthma (2009).
Access from
http://voices.yahoo.com/is-coffee-helpful-relieve-asthma-attack-
5125211.html?cat=68
on November 26, 2012.
 Ryn Gargulinski. Caffeine Advantages (2011). Access from
http://www.livestrong.com/article/511979-caffeine-
advantages/#ixzz2DiGuSZx8
on November 26, 2012.