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Task with Student Directions
Contributed by: Third International Math and Science Study (TIMSS)

Task: At this station, you will find out how your pulse changes when you climb up and down on a step for 5 minutes.

At this station you should have:

  • A watch with a second hand
  • A step on the floor to climb on

Read ALL directions carefully.

This is what you should do:

  • Find your pulse and be sure you know how to count it. IF YOU CANNOT FIND YOUR PULSE ASK A TEACHER FOR HELP.
  • Count your pulse for 10 seconds.
  1. Write the number of counts in the table below on the line marked 0 minutes.
  2. Now climb up and down on the step for about 5 minutes. Stop after each minute and write your pulse in the table below.
    Number of minutes climbing Number of pulse counts in 10 seconds
    0 Minutes
    1 Minute
    2 Minutes
    3 Minutes
    4 Minutes
    5 Minutes

  3. How did your pulse change during this exercise?

  4. Why do you think your pulse changed in this way?


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