Question

NEED HELP ASAP ILL GIVE 100 POINTS!!!

Pre-Lab Information
Purpose Plan an investigation to examine how heart rate changes during and after an exercise is
performed for two different periods of time.
Time Approximately 60 minutes
Question How does heart rate change during and after an exercise is performed for two different
periods of time?
Hypothesis In the space below, develop a hypothesis that will test the question.
Summary In this experiment, you will work with a partner to measure each other’s heart rate before
and after exercise. You will start by determining each other’s resting heart rate. Then, you
will do an exercise for a specific amount of time, measure each other’s heart rate
afterward, and then determine each other’s recovery period. You will then repeat this
procedure with the same exercise but for a longer period of time. You will choose the
type of exercise performed during the experiment as well as the two durations of time.
Student Guide (continued)
Background Information
It is time to get you thinking about the effects of exercise on heart rate. The experiment you will devise
should examine the changes in heart rate after an exercise is performed for two different periods of time.
You and your partner will need to determine each other’s heart rate before and after exercise as well as
each other’s recovery period. Your teacher will let you know what materials are available. You and your
partner should plan your investigation around these.
To find your heart rate, use the tips of your index and middle fingers to press lightly over the blood
vessels in your wrist or neck. Depending on the individual, sometimes one area is better for feeling pulse
than the other. Count your pulse for ten seconds. Multiply the number of pulses by six to find your number
of beats per minute.
Lab Procedure
Here is an outline of the steps you should follow to plan your investigation for this lab. Later in the guide,
you will have space to develop your ideas, collect data, analyze and discuss results, and draw
conclusions.
Step 1: Determine the types of data you will gather and the tools of measurement you will use to
collect the data.
How will you gather data for your experiment? If gathering quantitative data, you may want to
devise a table in which you can record your results in an organized manner. Also, consider how
you will record any qualitative or descriptive data in addition to your numerical results. You
should use a pencil to record data.
Step 2: Devise an experiment to examine the effects of exercise on heart rate for two different
periods of time.
Develop the main steps and describe how you will run the experiment. Your teacher will guide
you on what materials are available for your experiment.
Step 3: Stop. Have your teacher sign off on Steps 1 and 2 before you continue the investigation.
Step 4: Gather materials and set up your experiment.
Now that you know what you will do, gather the necessary items. Besides the objects you will
experiment with, make sure you have the necessary equipment to take measurements. If you
are working with lab partners, make sure each person knows his or her role in running the
experiment. Check your setup and make sure everything is in order before you proceed.
Step 5: Run your experiment.
As you proceed with your experiment, make sure you record all the necessary data and, if
working in groups, the role each student performed during the experiment. Make sure all
elements of your experiment are complete. Do not forget to clean up when you are done!
Step 6: Use the High School Lab Report Guide to write your lab report.
Student Guide (continued)
Examine the effects of exercise on heart rate for two different periods
of time.
Step 1: Determine the types of data you will gather and the tools of measurement you will use to
collect the data.
Make a list of the type of data you plan to collect. If gathering quantitative data, you may want to
devise a table in which you can record your results in an organized manner.
Student Guide (continued)
Step 2: Devise an experiment to examine the effects of exercise on heart rate for two different
periods of time.
Write the steps of your experiment.
Step 3: Stop. Have your teacher sign off on Steps 1 and 2 before continuing the investigation.
Student Guide (continued)
Step 4: Gather materials and set up your experiment.
Gather the necessary items and equipment. If you are working with lab partners, make sure
each person knows his or her role in running the experiment. Document the roles here.
Student Name Role
Student Guide (continued)
Step 5: Run your experiment.
Record your data and observations in the space below. Do not forget to clean up when you are
done!
Step 6: Use the High School Lab Report Guide to write your lab report

Answer 1

Heart rate increases during exercise to meet the body's increased oxygen demand and gradually decreases after exercise. Design an experiment to measure heart rate before and after exercise for two different durations of time.

Step-by-step explanation:

During exercise, heart rate increases to meet the body's increased oxygen demand. The heart rate will continue to rise until it reaches a maximum steady state, which is determined by factors such as fitness level and age. After exercise, heart rate gradually decreases as the body recovers.

For your experiment, you and your partner can choose two different durations of time for the exercise, such as 10 minutes and 20 minutes. Start by measuring each other's resting heart rate, then perform the exercise for the first duration and measure the heart rate afterward. Allow for a recovery period and then repeat the process for the second duration. Record your data and observations.

Make sure to follow the steps outlined in your lab procedure and consult with your teacher for any available materials or specific requirements. Good luck with your experiment!