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Fitness and Energy

In this worksheet, students will explain what it means to be fit and look at energy requirements of different people.

'Fitness and Energy' worksheet

Key stage:  KS 3

Curriculum topic:   Biology: Structure and Function of Living Organisms

Curriculum subtopic:   Nutrition and Digestion

Difficulty level:  

Worksheet Overview

What does it mean to be fit and healthy?

 

 

Body shape

 


We can often tell, just by looking at a person, whether they have a healthy diet. But can we do that for everyone? A healthy diet for one person may not be a healthy diet for another, as everyone is different. Different people may need to exercise more or less than others as well as eat different amounts of food. 

 

See if you can say how much the following people need to exercise and eat to do what they do:

 

SchoolchildrenRowersOffice workerPregnant mum


 

So, what is right for you?

 

It is important to know how to maintain a fit and healthy lifestyle. Fitness can be split into five categories. The Five S's of Fitness are:

 

  • Strength
  • Stamina
  • Suppleness
  • Speed
  • Stability
     


Measuring fitness

 

All of the above aspects of fitness include your heart, lungs and muscles. It is, therefore, important to know how to keep each of these healthy.

 
 
Healthy heart and lungs

 

A healthy heart and lungs are essential when it comes to maintaining fitness. A simple way to check your heart and lung health is running on the spot, or steps, for 30 seconds and monitoring the return of pulse and breathing rates to resting level.

 

Woman checking pulse

 

Everybody's recovery is different; athletes will return to their resting heart rate in just a few minutes, while people who haven't exercised in a long time might take two or three times longer. The faster the heart rate drops after you stop exercising, the healthier your heart is.


 

Energy Requirements

 

Everybody needs a certain amount of energy all the time simply to maintain their normal body functions like beating heart, breathing, maintaining a constant 37oC - this is known as your basic metabolic rate.  The amount each of us requires is based on our body mass and our activity (how hard our bodies are working).  Each kg of our mass needs 5.47KJ/hr.  So, every day, we need the following amount of energy from our food just to maintain our metabolic rate:

 

5.47 x body mass x 24hr

 

So, for a 40kg boy, he needs a basic: 5.47 x 40 x 24 = 5 251KJ/day.  How will that change with weight and activity?  What if he's heavier than 40kg?  What if he's playing tennis?

 

We will explore some of these areas in this activity.

 

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