15. Body Types & Weight

© Boardworks Ltd 20061 of 29

Learning objectives

What we will learn in this presentation:

Lear

ning

obj

ectiv

es


The characteristics of the three extreme somatotypesHow different somatotypes are suited to different physical activitiesHow body shape can be alteredDefinitions of ‘overweight’, ‘overfat’ and ‘obese’How body fat can be measuredHow weight can affect performance.


Somatotypes

People come in all sorts of shapes and sizes. Body type or physique can greatly affect performance in different activities.Body type is also known as somatotype.A performer’s somatotype can be measured against the three extreme somatotypes:

Endomorph Mesomorph Ectomorph


Endomorph

Extreme endomorphs have the following characteristics:

A lot of body fat

A lot of fat on the upper arms and

thighs

Wide hips and narrow shoulders

Fairly slim wrists and ankles


Mesomorph

Extreme mesomorphs have the following characteristics:

Very little body fat

A muscular body

Broad shoulders and narrow hips

A large head

Strong forearms and thighs


Ectomorph

Very little muscle or body fat

Narrow hips and shoulders

Thin legs and arms

A narrow chest and abdomen

Thin face and high forehead

Extreme ectomorphs have the following characteristics:


Which somatotype?

All performers are made up of elements of these three extreme somatotypes.Most people have a mixture of mesomorphic, endomorphic and ectomorphic characteristics.A person’s somatotype can be graded using a scoring system. They are given 3 scores between 1 and 7, according to how well they conform to each of the extreme somatotypes.1 is a low score, 7 is a high score. For example:

1, 7, 2

Low endomorph High mesomorph Low ectomorph

What would a person with this score look like?


Mesomorph

The mesomorphic shape is the most common body shape among elite performers.

Most sports favour the strong, muscular limbs and low body fat of the mesomorphic shape.

The Australian swimmer, Ian Thorpe, has a classic mesomorphic body shape.

© E

MP

ICS

Ltd


Which somatotype?


Somatotype charts


Somatotypes in sport

Certain somatotypes tend to be found in certain sports. The ideal somatotype for a performer will depend on their sport or event. In some cases, the position that they play in a particular sport might also be important.

Consider, for example, the various body sizes and shapes in a rugby team.


Somatotypes in sport


Altering body shape

Dramatically changing your body shape is difficult and can be damaging to your

health. Big changes are hard to maintain.

Body type is largely determined by the genes you inherit from your parents.However, you can alter your somatotype by training, or by changing your diet.

Eating more and/or exercising less will increase

your body fat, making you more endomorphic.

Weight training will increase muscle size, making you

more mesomorphic.

Eating less and/or exercising more

will decrease your body fat, making

you more ectomorphic.


Weight

Every individual has their own optimum weight – the weight at which they are healthy and able to perform at their best.Your optimum weight depends on a number of factors:

Height – In general, the taller you are, the more you should weigh.

Sex – Men usually have a higher optimum weight than women of the same height.

Bone structure – Some people have bigger bones and are naturally heavily built, without being overweight.

Muscle girth – People with big, well-developed muscles can weigh a lot without being overweight.


Overweight and overfat

A person who is significantly heavier than their optimum weight is classed as overweight.Being overweight is not necessarily harmful as it is possible for the extra weight to be in the form of muscle.However, if the extra weight is in the form of fat, then the person is classed as overfat. This means that an abnormally large percentage of their body is composed of fat.

Men are overfat if more than 19% of

their body is fat.

Women are overfat if more than 25% of

their body is fat.

Being overfat can affect your health, increasing your risk of heart disease and other illnesses.


Obesity

Obese people are people who are extremely overweight.

Men are obese if more than 25% of

their body is fat.

Women are obese if more than 30%

of their body is fat.

Obesity is very damaging to health. As well as heart disease, obese people run a higher risk of diabetes, varicose veins, menstrual disorders, infertility, skin diseases, liver disorders, cancer, joint problems and even depression.

Very obese people can be classed as morbidly obese, meaning that they are so overweight that it is endangering their life.


Obesity

Being obese does not stop you from becoming a successful performer in some sports. Andy Fordham

was World Darts Champion in 2004.

© E

MP

ICS

Ltd


Underweight

Being significantly below your optimum weight can also be bad for you.

The body needs some fat reserves – underweight individuals have a lower resistance to infection and can find it difficult to recover from illness. They may feel constantly tired and bone strength may deteriorate.

Underweight women can have trouble getting pregnant.

It is recommended that:

women should not have less than 10% body fat.

men should not have less than

5% body fat.


Weight


Weight charts

A rough way to determine whether someone is overweight or not is to use a height-to-weight chart.

The results are fairly arbitrary and take no account of muscle bulk and frame.


Weight charts


Measuring fat

In terms of health, a person’s weight is less important than the amount of fat they have.Unfortunately, it is quite difficult to measure the amount of fat in a person without laboratory equipment. An estimate can be obtained using skin-fold callipers.The thickness of the skin and outer layer of fat is measured in four places:

bicepstricepssubscapula (bottom of the shoulderblade)supra-iliac (abdomen).


Body Mass Index (BMI)

Another way of estimating body fat is to calculate an individual’s body mass index (or BMI).BMI is calculated by dividing the individual’s weight (in kilograms) by their height (in metres) squared.

BMI =weight (kg)

height2

So, a person who weighs 70 kg and is 1.70 m tall has a BMI of: 70

1.702= 24.2

A BMI of 19–25 is considered healthy. Over 30 is obese.


Body Mass Index (BMI)

BMI is not an appropriate test for everyone. It is calculated using a person’s height and weight only, so like the chart, the result does not take account of build and lifestyle.

Why do you think that a bodybuilder might be classed as too heavy by a BMI test, despite having very little body fat?

Under what circumstances could a person with too much body fat be classed as normal by a BMI test?


Weight and performance

A person’s weight can have a dramatic effect on their performance in different activities.

In some sports it is advantageous to be light.

Being light makes it easier for female gymnasts to keep their balance and control their momentum.

Heavy wrestlers can be harder to topple because their centre of gravity is lower.

In some sports, it is advantageous to be heavy.



Being overweight for your activity due to overeating can harm performance.The heavier your body is, the harder it is to move. An overweight performer may suffer from:

reduced stamina, due to having more weight to carryreduced flexibilityreduced agility.

Obese individuals can find it difficult to participate in physical activity at all.

They may also suffer from the more general health problems associated with being overweight, which could affect their participation and performance.



In some sports, performers may come under so much pressure to lose weight that they become underweight.

In sports like boxing or horse racing, in which competitors must be a certain weight, performers may end up using sweatsuits, saunas and even drugs in order to lose weight quickly. These methods can lead to severe dehydration, damaging performance.

Pressure to weigh less can lead to under eating, and in extreme cases, anorexia. This is an illness where an individual is so worried that they are fat, that they starve themselves.Performers who under eat often lack energy and concentration. Their strength and stamina may decline.


Effects of under eating and overeating


Exam-style questions

1. a) Describe the physical appearance of a performer

with an extremely ectomorphic body shape.b) Give an example of an activity that this performer is

likely to be suited to and explain why this activity

favours ectomorphic individuals. 2. a) What is meant by a performer’s optimum

weight?b) Explain why the optimum weight of a female ballet

dancer will differ from that of a male sprinter of the

same height.3. Describe how under eating may affect an individual’s

performance.

15. Body Types & Weight

Documents

Transcript of 15. Body Types & Weight