Exercise Investigation

Which activity, between Aerobics or Power Walking,

has a bigger impact on the percentage of heart rate increase,

among 15 and 16 year old girls with similar fitness,

with the average heart rate of 60 to 80?

INTRODUCTION

     The main focus of the lab this time was to find the relationship between exercise and cardiovascular activity. The research question I chose to focus was “Which activity, between aerobics or power walking, has a bigger impact on the percentage of heart rate increase among 15 and 16 year old girls, with the average heart rate of 60 to 80?” I thought that this experiment would be interesting since it did not require any special equipments and I could not really predict the results easily. The hypothesis I came up with at the beginning was that “If the type of sports affects the increase of heart rate, then power walking will increase the heart rate more than aerobics since it requires more dynamic movement relatively.” For aerobics, you mostly stay at one spot and have many rests in between the different exercises. On the other hand, when power walking, you have to move the skeletal muscles constantly. As the image below shows, oxygen is needed to provide energy to these muscles. Therefore, the heart will have to contract more powerfully and faster in order to move oxygen around. It is also important to note that skeletal muscle has the largest increase in the percentage of total blood flow than any other organs after exercise. Thus, power walking that has more movement in these muscles than aerobics will have a larger impact on the heart.

PROCEDURE

The Variables

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Equipments

-Stop watch to measure the 60 seconds

-Paper and pen to record the results

Procedure

  1. Choose 5 people from each exercise group that matches the controlled variables.
  2. Measure 60 seconds with your stop watch while your subject measures their resting hear beat.
  3. The subjects will exercise for 30 minutes.
  4. Measure 60 seconds with your stop watch while your subject measures their heart beat right after exercising.
  5. Steps 3 and 4 will have to be repeated once more for each exercise to obtain the sample size replicates.
  6. Process the data so that it shows the percentage ...

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