Scientific Investigation of Exercise andAdolescents
By observing Pulse rate and Recovery time Galindez | 2
Name: Bethesda Galindez
Student number: 212895116
TA name: Nanyoung Yoon
11 February 2014
Heart rate is dependent on age and gender in relation to exercise (Jensen-Urstad et al.
240). For instance, in Jensen-Urstad and his colleagues’research, female participants concluded
to have a heart rate variability lower than the male participants (Jensen-Urstad et al. 239). So, the
research accomplished that there are factors that affects results between humans and
cardiovascular fitness. But, as the human body is made to work, the pulse rates will result to an
inevitable increase in beats per minute.As proof, another research concluded that the
consumption of oxygen increased with all the subjects as exercise was done (Levy et al. 1237).
This lab’s purpose is to observe and compare a controlled group against an experimental
group based on the intensity of an exercise and the outcome heart rate. In addition, this lab is to
observe the different outcomes of pulse rate in beats per minute and recovery time in minutes.
Knowingly, the body uses energy during everyday activities. Therefore, there is a likely chance
that the body exerts more energy during a cardiovascular exercise; even more so when weight is
added to the workout. To sum up, the experiment will determine if adding weights to the
exercise, such as a stepping test exercise, would increase the productivity of the workout, the
recovery time, and the resulting pulse rate. Galindez | 3
Null Hypothesis (H ) o Adding weights to exercise does not increase heart rate and
Alternative Hypothesis (H ) aAdding weights to exercise does increase heart rate and
Materials and Methods
Lab partners: Loretta Regnelli, Ken Tang, and Melissa Ranessar.
The tools used for this lab were stopwatches, weights, teenagers (ages 18 years old and
older), and foot stools. The control group was the low intensity exercise which did not include a
3 lbs weight.Acontrol group was needed for latter comparison of the dependent variables’
results. For the high intensity exercise, the experimental group, a 3 lbs weight was added. Hence,
the independent variable was the 3 lbs weights and the dependent variables were the recovery
times (minutes) and pulse rates (bpm) of the teenagers tested on. Lastly, the constant variable
was the footstools and the stopwatches. The classroom was divided into two groups, the control
group and the experimental group, and as a result, ten replications of each group occurred.
Randomly observing the teenagers concluded too many unknown facts of individual traits such
as health problems and fitness level. Therefore known as deviations.
There were different tasks the students were required to do. However, both the control
group and experimental group (weight added) needed to do the same tasks. For example, the Galindez | 4
students executed the exercise then measured their pulse rates, before and after the exercise,
timed their recovery time and also timed the exercise (3 minutes per exercise) via the stopwatch,
and lastly, recorded all the data throughout the experiment.
To start off, each student in the control group completed the exercise without the weight,
stepping up and down a footstool. Prior to stepping, the students measured their pulse in beats
per minute for thirty seconds and multiplied by two. Each control group student was required to
do the low intensity workout first. While a student would be doing the step test, another student
would use the stopwatch to time 3 minutes.After the time was up, the student recorded their
pulse rate for a minute’s value. Furthermore, the student records how long it takes to have their
pulse rate back to the resting state (before the exercise).
The experimental group was almost the same procedure as the control group, only that
this group carried a 3 lbs hand-held weight while doing the step test. The test was the same
length of exercise. Once again, the pul