Biology + Sports and Exercise Science
Measure how exercise changes pulse rate and recovery
Record pulse before, during and after exercise for several volunteers and compare recovery times.
- DifficultyEasy
- Estimated time1 day
- Budget₹0
- ClassClass 8–11
- Team2–4 people
- You needNo equipment
Prerequisites: None beyond your class work
Original · by TechnifyedExperimentInvestigationBeginner friendlyFree to doNo equipmentResearch orientedWell documentedTwo subjects
Overview
Record pulse before, during and after exercise for several volunteers and compare recovery times.
Why build this?
Recovery time is a real measure of fitness that anyone can take with a stopwatch.
What you will learn
- How to take a pulse accurately
- Why heart rate rises with exercise
- What recovery time shows
Skills you will use
Safety and ethics
- This project involves people. Explain what you are doing and get their consent (a parent's or teacher's for children), let anyone stop at any time, collect only what you need, and remove names before you share results.
Materials and tools
- Stopwatch
- Five or more volunteers
- Notebook
- Space to exercise
Tools and software
Step-by-step roadmap
Start
You will finish with: recovery curves for each volunteer and a comparison of average recovery time.
- 1
Prerequisites
Nothing special to know first. Then collect the 4 items in the materials list.
- 2
Learn
- How to take a pulse accurately
- Why heart rate rises with exercise
- What recovery time shows
- 3
Plan
Write your question, your hypothesis and the one thing you will change. Draw the table you will fill in before you start.
- 4
Build
- Record each person's resting pulse for one minute.
- Have them do two minutes of step-ups or skipping.
- Record the pulse immediately and every minute for five minutes.
- Plot pulse against time for each person.
- Compare recovery times between regular exercisers and others.
- 5
Test
Repeat every reading at least three times and check the result against what the science predicts.
- 6
Document
Record every reading with its unit, photograph the setup and draw a graph of the result. Report structure
- 7
Present
Explain the question, the method and the graph in two minutes; keep the setup ready to demonstrate. Presentation structure · Viva questions
- 8
Publish
Share the report and photos with your class, a science fair or your school magazine.
Expected outcome
Recovery curves for each volunteer and a comparison of average recovery time.
Other versions of this project
Beginner version
Measure your own pulse before and after one minute of exercise.
Advanced version
Compare different exercise intensities for the same people.
Make this project better
- BasicMeasure your own pulse before and after one minute of exercise.
- This projectMeasure how exercise changes pulse rate and recovery
- AdvancedCompare different exercise intensities for the same people.
Ways to do this project
Text marked "You write this" is a prompt for your own work; everything else is specific to this project.
- Problem
- You write thisWrite your question as: How does [what you change] affect [what you measure]?
- Hypothesis
- You write thisWrite it as: If [I change this], then [this will happen], because [reason].
- Variables
- You write thisName the one thing you change (independent), the thing you measure (dependent) and what you keep the same (controlled).
Materials and procedure are in Materials and the Roadmap.
Observation table
You write thisDraw a table with one column for what you change, one for each repeat reading and one for the average.
- Graph
- You write thisPlot what you changed along the bottom and what you measured up the side; use a bar chart for categories and a line graph for numbers.
- Results
- You write thisState what the graph shows in one or two sentences, with numbers.
- Conclusion
- You write thisSay whether the result supports your hypothesis and why you think so.
Display board
- Title and your name
- Question
- Hypothesis
- Materials
- Procedure (with photos)
- Data table and graph
- Conclusion
- What you would do next
Questions judges ask
- Why does pulse rise during exercise?
- What does a short recovery time suggest?
- Why measure several people?
- What would you change if you did this again?
- What was your biggest source of error, and how did you reduce it?
- Where is this idea used in real life?
- Research question
- You write thisOne question you can answer with data, narrow enough to finish in the time you have.
- Hypothesis
- You write thisWhat you expect to find, and why.
- Variables
- You write thisWhat you change or compare, what you measure, and what you hold constant.
- Methodology
- You write thisDescribe the method in enough detail that someone else could repeat it: sample, tools, procedure.
- Data collection
- You write thisSay what you will record, how many times, and how you will keep the records safe.
- Analysis
- You write thisChoose the table, chart or test that answers the question; report averages with their spread.
- Limitations
- You write thisList what could have affected the result: small sample, instrument limits, things you could not control.
Literature review
Find five to eight sources (your textbook, review articles, reports) and note what each says about your question. Group them by idea, not one after another, and end with what is still not known.
References
List every source you used in one style throughout (author, year, title, where it was published, link and the date you opened it).
Working as a team
2–4 people. Suggested roles:
Report and presentation
Report structure
- Title and question
- Background: the science behind it
- Hypothesis
- Materials
- Method (steps, with a diagram or photo)
- Observations (table)
- Results (graph and calculation)
- Sources of error
- Conclusion
- What you would do next
- References
Presentation structure
- The question
- Why it matters
- The idea behind it
- Setup (photo)
- Method in three steps
- Results (one clear graph)
- What the result means
- Errors and limits
- Conclusion and next step
Viva questions
Try answering before you open each one.
Why does pulse rise during exercise?
Muscles need more oxygen, so the heart pumps faster.
What does a short recovery time suggest?
A fitter heart and circulation.
Why measure several people?
Individuals vary, so a group gives a fairer picture.
Resources
Source and attribution
Original
Written by Technifyed. Free to use for your own school or college project; write the report in your own words. Added 1 Oct 2026.
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