Heart Rate Investigation Lab PDF

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Scatterplot, Discussion and Laboratory Notebook Questions for the Heart Rate Investigation Lab....

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Heart Rate Investigation Lab

Scatterplot Discussion The purpose of the Heart Rate Investigation Lab was to observe the impact of physical exercise on a subject’s heart rate measured in bpm. The data presented in the scatterplot above displays the average heart rate at rest and after performing various physical exercise. In turn, the visual exhibits the factors that result in an increase in heart rate. As illustrated in Figure 1, the results from each physical activity serve as sufficient support for the hypothesis that physical exercise increases the human heart rate. Our group performed the physical activity of holding our breath, which resulted in an increase in heart rate. However, Group 4’s breath holding had the smallest increase in heart rate relative to the other groups’ physical activities. Consequently, the

remaining groups also displayed the consistent trend of increased heart rate after 30 seconds of various physical activities. The highest increase in heart rate was seen in Group 3, where they performed jumping jacks for 30 seconds. These physical activities lead to the human body’s muscles being severely exerted, which requires them to have more oxygen. The heart increase the rate at which it pumps blood in order to get muscles the necessary amount of oxygen they need. “The maximal rate of heart rate increasing […] correlates with exercise performance” (Nelson et al., 2020). The lab data is supported by this article’s observance assessment by displaying an increase in heart rate when various physical activities are performed The increased need for oxygenated blood to be spread throughout the human body results in an overall increase in heart rate (bpm).

Works Cited Nelson, M. J., Bellenger, C. R., Thomson, R. L., Robertson, E. Y., Davison, K., Olstad, D. S., & Buckley, J. D. (2020). Optimisation of assessment of maximal rate of heart rate increase for tracking training-induced changes in endurance exercise performance. Scientific Reports, 10(1), 1-6. https://doi.org/10.1038/s41598-020-59369-6

Lab Notebook Questions 1) In the experiment, what were the different questions or hypotheses examined by the class with respect to factors that affect heart rate? a. Does physical exercise increase heart rate (bpm)? b. Which form of physical exercise had the most/least increase in heart rate (bpm)?

c. How does each physical exercise impact the human body to increase heart rate (bpm)? 2) Describe two other variables that were, or should have been, controlled for this experiment and how they might have been controlled? a. One variable that should have been controlled was heart-related medication. One member of our lab group was taking prescription medication for a medical condition, which ultimately impacted her heart rate. This resulted in an outlying, irregular heart rate which should have been controlled for more accurate results. This variable could have been controlled by not allowing anyone on heart-related medication to participate in the experiment. b. Another variable that should have been controlled was gender. It is statistically and scientifically proven that males are more likely to be increasingly physically active compared to women. Therefore, the control and test heart rates of males could be lower than females due to the higher physical fitness. This variable could have been controlled by ensuring that males and females were equally spread and represented amongst the control and test groups. 3) Why is the repetition of experiments important? Hint: Think about standard deviation. The repetition of experiments is imperative because it provides further trials to reduce error. Uncontrolled and confounding variables can also be discovered and manipulated during repetition, which can increase the accuracy of the experiment. Ultimately, repetition of experiments decreases the margin of error and deviation from the mean. This will decrease the standard deviation which increases the accuracy of the experiment’s results.

4) Using the Scientific Method, explain how you would go about studying the effect of caffeine on heart rate. Incorporating the scientific method, I would begin my experiment by observing and deriving questions about the topic of caffeine’s impact on heart rate. Researching and gaining knowledge from articles and observational studies is crucial in the next step: developing a hypothesis. In regard to this experiment, a potential experimental hypothesis could be: If an individual consumes caffeine, then there will be an increase in his/her heart rate. In addition, I would create procedures to conduct the real experiment. The experiment would include variables, controls and tests. The control would consist of measuring heart rate (bpm) before drinking caffeine. In contrast, the test experiment would measure heart rate after drinking caffeine. The experiment should be repeated three or more times to increase accuracy and reduce margin of error, which could also evoke further discovery and supporting evidence. Furthermore, analyzing the results and drawing final conclusions will wrap up the experimentation process. Lastly, I will publish my experimental findings to the rest of the scientific community for other scientists to replicate or utilize in their applied research....