Heart Rate (Casey Hayes)
Research Question and Hypothesis
How will heart rate change over time in different activities with moderate-hard effort over time? Is hear rate directly correlated to blood pressure?
Standards
HS-LS1-3
Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis
Science and engineering practices
design explanations construct solutions
Experimental Design
Individuals will check heart rate during a 20 minute bout of movement. 20 minute run, 30 minute bike ride, and 20 minute walk. Checking heart rate every minute. Does heart rate change during the exercise? What does it mean when you reach a constant heart rate? What differences will you see in others.
Independent variable
The independent variable is time. The heart rate will be checked twice during the first minute of exercise, and then every minute after that.
Dependent variables
Students will be measuring heart rate during the exercise of different activities.
Series
How will heart rate change at different miles per hour on the treadmill? Each activity will have different speeds and intensities.
Constants and Controls
The control for this experiment is the resting heart rate while sitting for 15 minutes with legs unfolded. This will give you the most accurate measure other than laying down.
Materials
running shoes
treadmill
exercise bike
heart rate monitor
timer
towel
Procedures
Students or participants will get their resting heart rate while sitting for a 15 minute period of time. next students will make predictions on how the heart rate might perform as they start to exercise. Students will exchange guesses and then team up to help collect data.
Predict heart rate after exercise does it fall? What determines how quickly it falls.
Analysis & Conclusions
Students will discuss why the heart rate followed the pattern that it did. Why did the heart rate increase with activity?
Which activity appears to be more strenuous?
Why did the heart rate stay continuous or change over time?
Should we take more trials?
will all people have the same heart rate?
what categories should we separate to give is more accurate data?
Photos & Movies
References
Include links to all relevant references.