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Physical Education Department. SKILLS & TECHNIQUES. SKILLS & TECHNIQUES. GYMNASTICS. CENTRE OF GRAVITY & STABILITY. STANDARD GRADE. Physical Education Department. SKILLS & TECHNIQUES. SKILLS & TECHNIQUES. Balance is important in the activity of gymnastics. STANDARD GRADE.

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Presentation Transcript
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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

GYMNASTICS

CENTRE OF GRAVITY & STABILITY

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

Balance is important in the activity of gymnastics

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

EQUILIBRIUM

An object or person is in a state of equilibrium when their motion is not changing

Static equilibrium is used to describe a stationary object or person

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

EQUILIBRIUM

An object or person is in a state of equilibrium when their motion is not changing

Dynamic equilibrium is used to describe an object or person travelling at a constant speed, in the same direction

STANDARD GRADE

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Physical Education Department

STABILITY

STABILITY is important in many activities, it affects the control of your movements. If you are off-balance when making a hockey tackle you can stumble and fall

which could make the tackle fail and hence allow the attacker through closer to his target.

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

BALANCE

This is about maintaining the equilibrium (Balanced position) of your body.

STATIC BALANCE is a balance without movement. (for example, you may do a handstand)

Here is a female gymnast doing a handstand, with a variation, on the beam

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

BALANCE

This is about maintaining the equilibrium (Balanced position) of your body.

DYNAMIC BALANCE is a balance whilst moving, for example a badminton player moving across the court, playing a shot. and moving back into the ready position

Here is a badminton player reaching out to play a low return

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

Being BALANCED depends upon your CENTRE OF GRAVITY

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

Gravity is the force pulling an object or a person to the ground

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

THE CENTRE OF GRAVITY

  • is the point at which gravity acts upon the body.
  • is the point at which your weight is evenly balanced
  • is the point about which your body will rotate

STANDARD GRADE

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Physical Education Department

  • The height of the centre of gravity

The point of the Centre of Gravity

The line of the Centre of Gravity

X

  • The base of support
  • The line of the centre of gravity falls inside the base of support

The Base of Support

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

Stability depends on:

STANDARD GRADE

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Physical Education Department

The Centre of Gravity is at a different height

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

How to be MORE stable

The LOWER your centre of gravity the MORE STABLE you will be

STANDARD GRADE

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Physical Education Department

The LARGER the area of your Base of Support, the MORE STABLE you will be

The Base of Support is larger

The Base of Support is smaller

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

How to be MORE stable

STANDARD GRADE

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Physical Education Department

The CLOSER your centre of gravity is to the centre of your base of support, the MORE STABLE you are.

The Line of Gravity falls outside of the centre of the Base of Support

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

How to be MORE stable

STANDARD GRADE

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Physical Education Department

The HEAVIER you are, the MORE STABLE you will be.

Greater force acting down through the line of gravity

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

How to be MORE stable

STANDARD GRADE

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Physical Education Department

The MORE YOU LEAN into an oncoming force, the MORE STABLE you will be.

Direction of the Force

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

How to be MORE stable

STANDARD GRADE

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Physical Education Department

The Centre of Gravity

The Line of Gravity

The Base of Support

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

How does the centre of gravity play a part in this balance?

STANDARD GRADE

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Physical Education Department

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

Question: Which of the following gymnasts is the MOST STABLE?

Gymnast A

Gymnast B

Gymnast C

STANDARD GRADE

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Physical Education Department

X

X

X

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

  • Gymnast A is the most stable because:
  • They have the lowest centre of gravity
  • They have the largest base of support
  • And like gymnast C their centre of gravity is in the centre of the base of support

STANDARD GRADE

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Physical Education Department

Summary

In many activities balance can be very important. Gravity plays an important part in balance. Gravity is the force pulling a person or object to the ground.

The point at which gravity on the body is known as the centre of gravity. This will change depending on your height, shape or the position in which you stand.

Balance is not difficult while a person’s centre of gravity is directly above their base of support, but when it moves to one side, the force of gravity act more on that side causing the person to topple over

SKILLS & TECHNIQUES

SKILLS & TECHNIQUES

STANDARD GRADE