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Mathline

Healthy Hearts (Grade Levels: 4 - 7)

Concepts Overview  |  Healthy Hearts |  Comparing Calories  |  Medicine and You  |  Answers  |  More Math Concepts

cardiopulmonary Your heart plays an important role in your health. The heart moves oxygen and other nutrients to all the different parts of the body and helps carry away the waste products. Here are a few activities to get us thinking about our hearts.

1. Do you think your heart has beaten a billion times?

2. One’s heart rate is usually reported in beats per minute. Take your pulse and figure out how many times your heart beats in 10 or 15 seconds. Use this to figure out your resting heart rate in beats per minute.

3. At this rate, how many times does your heart beat in one day?

4. Using your rate, estimate how long it would take for your heart to beat a billion times.

5. Estimate the number of times your heart has beaten. (Answers will vary. Students need to determine the number of years and days they have been alive and use their rates to calculate the number of heart beats.)

6. How many times do you think your heart will beat in your lifetime?

When we exercise, our heart rate increases. The American Heart Association has some guidelines for heart rates and exercises for adults, which we will use even though we are not all adults yet.

7. The American Heart Association has a value called average maximum heart rate. Find this value by taking 220 and subtracting your age. What is your average maximum heart rate?

8. When you exercise, you should try to have your heart rate in the target heart rate zone. This zone is between 50% and 75% of your average maximum heart rate. What is your target heart rate zone?

9. Jump up and down for a full minute. When you are finished, immediately take your pulse and determine your heart rate. What percentage of your maximum average heart rate is your exercising heart rate? Did you achieve your target heart rate zone?