The document explores how various factors, particularly exercise intensity, can affect heart rate during physical activity. It outlines a method for conducting an experiment to measure heart rate variations across different exercise intensities while controlling for variables such as age and health status. The findings support the hypothesis that increasing exercise intensity leads to a corresponding rise in heart rate, highlighting the cardiovascular response to exercise.

1. Summative assessment
Science
“Investigate a factor affecting pulse rate.”
By-Aditya pandey

3. factors that can affect heart rate or pulse
rate include:
● - Age
● - Gender
● - Physical activity
● - Fitness level
● - Body position

4. ● - Medications
● - Caffeine
● - Alcohol
● - Tobacco
● - Emotional state
● - Stress
● - Illness
● - Medical conditions (e.g. thyroid problems,
diabetes, cardiovascular disease)

5. Identify and analyse all possible factors
which can affect the pulse rate during
exercise
The factors that can affect the pulse rate during exercise include
the intensity of the exercise, the duration of the exercise, the
level of fitness of the person, their age, and their overall health.

6. Choose one of the factors among the identified
ones and explain how the factor would affect the
pulse rate.
The intensity of the exercise is one of the most significant factors
that can affect the pulse rate. When a person exercises at a
higher intensity, their muscles will require more oxygen to work
efficiently, and this will cause their heart rate to increase.

7. Formulate a testable hypothesis
If the intensity of exercise increases, then the heart rate will also
increase."
select materials and equipment
Heart rate monitor, treadmill/cycle equipment, stopwatch/
timer, and any required safety gear (appropriate shoes,
clothing)
Select appropriate materials and equipment

8. Choose the range of independent variable
Intensity of exercise can be measured through
levels of physical activity i.e. low, moderate and
high physical activity.
Identify what would be the control variables and
how would you control them.
Control variable(s) include age group, gender, weight, and overall
health. Control of these variables can be maintained by choosing similar
participants of the same age range, similar fitness levels and weight.

9. Write a clear, logical method
1. Participants will be instructed to wear the heart rate
monitor.
2. They will be asked to jog or walk on a treadmill or ride
a stationary bicycle for 20 minutes.
3. The first 5 minutes will have low physical activity, 10
minutes will have moderate physical activity, and the last 5
minutes will be high physical activity.
4. Their heart rate will be recorded at the beginning and
end of each level of physical activity.
5. The data will be collected and processed.

10. Mentioning the relevant variables involved and
describing how the data will be collected and
processed
When collecting data on heart pulse rate, the relevant variables
involved include:
Independent variable: Activity level (resting or exercising)
Dependent variable: Heart pulse rate (measured in beats per minute)
Control variables: Age, sex, health status, medications, and
environmental factors such as temperature and altitude.

11. To collect data, we could conduct an observational study in which
participants are asked to wear a heart rate monitor or use a smartphone
app to record their heart rate during specific or everyday activities over a
period of time. Some ways to measure heart rate include:
- Physical activity: Participants could use a heart rate monitor to record their
heart rate before, during, and after exercise or other physical activity.
- Resting: Participants could take their pulse and record their heart rate
while at rest, such as in the morning before getting out of bed or after a
period of relaxation.

12. Once we collect the data, it can be processed by computing
summary statistics, such as mean, standard deviation, and
percentiles, for each variable. We can use statistical
techniques such as correlation analysis and regression
analysis to examine the relationships between activity level
and heart pulse rate, while controlling for other variables that
may affect heart rate. This can help us understand how
different levels of activity affect heart pulse rate, and what
other factors may be involved.

13. organize, transform and present data using numerical and
visual forms (tables and graphs) as relevant with the task.
The collected data can be presented in a table or graph format to easily analyse
and compare the heart rate variation with changes in exercise intensity
| Exercise Intensity | Heart Rate (beats/min )|
| Rest | 65 |
| Light Exercise | 95 |
| Moderate Exercise| 120 |
| Vigorous Exercise | 150 |

14. suggest improvements to the method and make
suggestions for further inquiry when relevant
1. Use a more accurate and reliable heart rate monitor.
2. Standardize the exercise protocol.
3. Increase the sample size.
4. Incorporate other measures of physiological response.
5. Include a control group.
6. Investigate the effect of dietary factors on heart rate response during exercise.
7. Investigate the effect of environmental factors on heart rate response during
exercise.
8. Investigate age and gender-related differences in heart rate response to
exercise.
9. Investigate the effect of different types of exercise on heart rate response.
10. Investigate the effect of different durations of exercise on heart rate response.

15. Criteria B,C

16. Aim: To investigate the effect of exercise intensity on heart rate
variability.
Materials required:
Heart rate monitor, treadmill or stationary bike.
Variables:
- Independent variable: Exercise intensity (measured in mph or
watts)
- Dependent variable: Heart rate (measured in beats per minute)
- Controlled variables: Age, gender, body composition, room
temperature, time of day, hydration status

17. Hypothesis: As the exercise intensity increases, the heart
pulse rate will also increase. This is because the heart
needs to pump more blood to supply oxygen and nutrients to
the muscles during exercise.
Theory: The heart rate increases during exercise to deliver
more oxygen and nutrients to the muscles to support their
increased metabolic demands. This is known as the
cardiovascular response to exercise.

18. Method:
1. Participants rest for 5 minutes to establish a baseline heart rate.
2. Participants exercise at different intensities (e.g. 3 mph, 5 mph, 7 mph) for 5 minutes each.
3. The heart rate is recorded every minute during exercise.
4. The data is recorded in an observation table.

19. Observation table:
| Exercise Intensity (mph)) | Heart Rate (bpm) |
| 3 | 120, 125, 127 |
| 5 | 140, 147, 145 |
|. 7 | 165, 170, 168 |
Graph:
X-axis: Exercise intensity (mph)
Y-axis: Heart rate (bpm)

20. Conclusion: The results indicate that as exercise
intensity increases, heart rate also increases. This
supports our hypothesis and the principle of
cardiovascular response to exercise. The controlled
variables help to ensure the validity of the results.
Evaluation: The method is valid and reliable, but there
may be some sources of error, such as individual
variability in heart rate response, other factors that affect
heart rate, and measurement error. Therefore, to
increase the reliability of the results, a larger sample size
could be used.

21. Extension of work: Further studies could be conducted
to investigate the effects of other factors on heart rate
during exercise, such as duration of exercise or different
types of exercise. Additionally, investigating heart rate
recovery time after exercise could provide additional
insights into cardiovascular health.

22. Bibliography

23. Thankyou