GCSE PE

Unit 1.2.2

Regular exercise and the effect of lifestyle on the CV system

There are 4 main physiological effects on the body when we exercise (as well as a by product that is produced) .You have 1 minute to discuss what these are with your partner……..

3. Sweating

1. Breathing

2. Body temp4. Muscles ache

5. Build up of Lactic Acid

By the end of this lesson you should be able to:

Explain the effects that regular long term involvement with exercise has on your body

Understand and explain the negative effect that lifestyle has on the CV system

Know what you need to revise for the end of unit test

Immediate?

Long-term?Task 4 page 7

1) The resting heart rate decreases

2) The heart gets bigger in size

3) Your recovery rate improves

4) Stoke Volume increases

5) Cardiac output increases

6) Decreased blood pressure

7) Healthy veins and arteries

Regular or sustained participation in physical activity has many benefits for the long term:

With regular exercise the heart becomes bigger and stronger so it

can supply the same amount of blood in fewer beats.

Therefore the heart of a person who is fitter beats fewer times, this in turn is more efficient and results

in less stress on the heart.

This also means that their resting heart rate is much lower due to the increased efficiency of the heart.

Muscles

Your recovery rate is how quickly your body returns to normal following a period of exercise.

Recovery rate is a good indicator of fitness. The quicker you recover, the fitter you are.

As you recover from exercise, changes happen in the following areas:

Heart rate

Lactic acid levels in the blood

Glycogen stores

Now we know what heart recovery rate means, let’s

go and test it!

Task 5 on page 8

“ the volume of blood pumped out of the heart by each ventricle during

one contraction”

In simple terms:

The amount of blood pumped out by the heart in one beat

So what happens???

• Heart becomes more efficient at rest and work

• Stronger heart

“ the amount of blood ejected from the heart in one minute”

In simple terms:

The amount of blood pumped out of the heart in one minute

cardiac output = stroke volume × heart rate

So what happens???

• Heart becomes more efficient at rest and work

• Stronger heart

Task 6 Page 10

Here are some examples:

HR = 72 bpmSV = 70 mlCO = 72 x 70

= 5,040 ml

HR = 200 bpmSV = 150mlCO = 200 x 150

= 30,000 ml

At rest… Maximum Sub Maximum

HR = 130 bpmSV = 100 mlCO = 130 x 100

= 13,000 ml

Task 7 Page 11

Regular exercise reduces blood pressure.

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Regular exercise reduces blood pressure.

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THE EFFECT OF LIFESTYLE ON THE CV SYSTEM......

By the end of this lesson you should be able to:

Explain the effects that regular long term involvement with exercise has on your body

Understand and explain the negative effect that lifestyle has on the CV system

Know what you need to revise for the end of unit test

Complete the following:

1. Update any missed notes from today’s lesson.

2. Revise for an end of unit test next lesson.