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Year 8

The effects of exercise on breathing and heart rate

I can plan and carry out an investigation into the effects of exercise on breathing rate or heart rate.

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New
New
Year 8

The effects of exercise on breathing and heart rate

I can plan and carry out an investigation into the effects of exercise on breathing rate or heart rate.

Download all resources
Share activities with pupils

Lesson details

Key learning points

  1. Identifying independent variable (amount of exercise) and dependent variable (heart rate or breathing rate).
  2. Identifying control variables (the person and the length of time spent exercising).
  3. The independent variable (amount of exercise) is categoric data and goes on the x-axis of a bar chart.
  4. The dependent variable (heart rate or breathing rate) goes on the y-axis of a bar chart.
  5. Using knowledge of cellular respiration to explain the results.

Common misconception

Breathing is the same as respiration.

Be clear that breathing is the mechanical process to get oxygen in and carbon dioxide out. Whereas, respiration is the chemical process that provides energy for the cell.

Keywords

  • Dependent variable - The factor that is being measured.

  • Independent variable - The factor that is being changed.

  • Breathing rate - The number of breaths per minute.

  • Heart rate - The number of heart beats per minute.

  • Control variable - A factor that needs to be kept the same to make the investigation valid.

Some students will prefer to count breaths than find their pulse.
Teacher tip

Content guidance

  • Risk assessment required - equipment

Supervision

Adult supervision required

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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Starter quiz

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6 Questions

Q1.
Which image shows the lungs?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
An image in a quiz
Q2.
Mitochondria need and oxygen to carry out respiration.
Correct Answer: glucose, sugar, carbohydrates
Q3.
The job of the heart is to pump around the body.
Correct Answer: blood
Q4.
Match the blood cell to its function.
Correct Answer:white blood cells ,kill bacteria and viruses

kill bacteria and viruses

Correct Answer:red blood cells ,carry oxygen around the body

carry oxygen around the body

Q5.
True or false. Muscles need energy to relax.
True
Correct answer: False
Q6.
Who has the best answer to why do people need to breathe?
Aisha: "For respiration."
Izzy: "To get oxygen for respiration."
Correct answer: Lucas: "To get oxygen for respiration and remove carbon dioxide."
Sam: "So they can live."
Q1 image 2 Macrovector/Shutterstock Q1 image 3 Macrovector/Shutterstock Q1 image 4 Macrovector/Shutterstock

Exit quiz

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6 Questions

Q1.
variables need to be kept the same to make an investigation valid.
Correct Answer: Control, control
Q2.
Match up the type of variables to their description when investigating the effect of the exercise on breathing rate.
Correct Answer:breathing rate,dependent variable

dependent variable

Correct Answer:level of activity,independent variable

independent variable

Correct Answer:person,control variable

control variable

Q3.
Order the statements to create a method to find your breathing rate after vigorous exercise.
1 - Set the metronome to 30 BPM and start the stop clock.
2 - Do a jumping jack everytime you hear a beep.
3 - Continue for one minute.
4 - Stop exercising and count the number of times your chest rises in 30 seconds.
5 - Multiply the number of breaths by two and record in your table.
Q4.
Match up the variable to the axis the measurements should be plotted on when drawing a bar chart.
Correct Answer:x-axis,independent variable (amount of exercise)

independent variable (amount of exercise)

Correct Answer:y-axis,dependent variable (heart rate or breathing rate)

dependent variable (heart rate or breathing rate)

Correct Answer:not plotted on either axis,control variable

control variable

Q5.
Work out the mean of the following measurements: 67, 69, 68.
Correct Answer: 68
Q6.
Select the reasons why heart rate and breathing rate increase during exercise.
Correct answer: To provide more oxygen and glucose to the muscles for cellular respiration.
Correct answer: The provide muscles with fuel to contract.
To remove oxygen from the muscles and body as it is a waste product.
Correct answer: To remove carbon dioxide from the muscles and body as it is a waste product.
The provide muscles with fuel to relax.

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