title: How does running duration(time~~~~~)affect your heart rate
names: Vitas 23448, Katherine 23388
independent variable: the time people spent running (s)
dependent variable: their heart rate beat/min (BPM)
controlled variables: running speed, student age the age of students,( about the same),
bodyweight of students( about the same), intake of caff eine and medicalsmedical and
doping situation( no), air and temperature
hypothesis:
Your H heart rate increases linearly as your running duration increases.
equipment:
treadmill, stopwatch
Precaution:
1. Rest for at least 3-5 minutes before a run
2. Stop the treadmill before you stop running ,
procedure:
1. set the treadmill speed to 6.5km/h
2. Measure the initial heart rate of the runner by counting beat per 20s(We count the number of pulse as beat )
3. calculate the heart rate. Heart rate = 3 *beat per 20s (Unit:BPM)
4. As the runner start to run, record running time for 30s.
5. Measure the heart rate just after the runner stops by counting beat per 20s and calculate the Heart rate like the above
6. Repeat step 3 to step 5 while only change the running time by adding 30s until running time = 150s)
7. Sketch a Heart Rate V.S. Running time graph
8. Collect at least 5 different samples(runners) following the same procedure from step1 to step 7
1. Draw a table as below:
(~~~~~)
2. 4 students go to the gym. One student will be the runner and any one of the other 3 student will
be the timekeeper.
3. The runner sits down and relaxes. He/ she measures the number of heart beats in one minute, by
measuring his/ her pulse, with the help of the timekeeper. He/ she records the value in the table, in
the column " at rest".
4. Set the speed of the treadmill to 65m/ min(~~~~).
5. The runner runs on the treadmill for 30s.
6. When 30 s is over, the runner stops running immediately and the timekeeper starts the stopwatch.
The runner measures his/ her pulse in 20s. Multiply the value by 3 to get the number of pulses in 1
min. He/ she records the result in the table.
7. The runner takes a 5 min rest.
8. After that, he/ she repeats steps 4-7 three times, running 30 s more each time (runs 60s, 90s
and 120 s respectively) and record the values in the table. Now he/ she ends his/ her role as the
runner.
9. Repeat steps 3-8 three more times, each time with a new runner, until all 4 students has run for 4
diff erent time durations. Record all values in the table.
10. Sketch a graph according to the values in the table.
table(with data):
(~~~~~)
graph:
(~~~~~~)
analysis of results:
The graph is non-linear and the increase of heart rate decreases as the running time increase.(~~~~)
sources of error:
[1.] 1. The method that calculates heart rate may not be accurate a s some beat may not
be clear and strong
1. 2. Diff erent people have diff erent fi tness levels and body sizes, which might aff ect their heart
rates, making the results less reliable.
2.(~~~~~~)
improvements:
1. We can use a stethoscope to ensure us miscounting the number of beats
2. (~~~~~)
2.
conclusion:
(~~~~~)
