The Benefits of exercise on the CV System.
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Transcript of The Benefits of exercise on the CV System.
![Page 1: The Benefits of exercise on the CV System.](https://reader035.fdocuments.us/reader035/viewer/2022062408/5681301c550346895d9598bd/html5/thumbnails/1.jpg)
The Benefits of exercise on the CV System.
Mr. P. Leighton
GCSE PE
![Page 2: The Benefits of exercise on the CV System.](https://reader035.fdocuments.us/reader035/viewer/2022062408/5681301c550346895d9598bd/html5/thumbnails/2.jpg)
Today’s Session…
• All of you: will understand the benefits of regular exercise on the CV system.
• Most of you: Will understand the key terms Cardiac Output and Stroke Volume when talking about the CV System.
• Some of you: Will be able to attempt the exam style question at the end of the session.
![Page 3: The Benefits of exercise on the CV System.](https://reader035.fdocuments.us/reader035/viewer/2022062408/5681301c550346895d9598bd/html5/thumbnails/3.jpg)
Recap: 5mins- So what happens to the body during exercise?
BreathingFaster and
Deeper
Muscles begin To ache
Sweating starts
Blood Pressure Increases
Adrenaline occurs
Increased HR
EXERCISECAUSES…
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While all this is happening…
• Lactic acid builds up during exercise.
• It is poison to you body- it can cause cramp and eventually stop muscles working.
• The reason it is used is because Glycogen stores in muscles are depleted.
• Athletes must rest to allow the blood to bring fresh O2
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So we can produce energy…
With Oxygen in AEROBIC RESPIRATION
Without Oxygen in ANAEROBIC RESPIRATION
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So what happens if you carry on exercising?
• Decrease in HR.
• Heart recovery rate increases
• Increased Stroke Volume
• Cardiac Output increases.
• Blood Pressure is reduced.
• Healthy arteries and veins
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Decrease in Heart Rate…
• Resting HR gives an indication of fitness.
• The heart is a muscle- the fitter you are the bigger and stronger it gets.
• It can then supply the same amount of blood with fewer beats.
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Heart Rate Recovery Increases...
• The faster the recovery rate, from WORKING to RESTING HR, the fitter the person.
• Christine Ohuruogu working HR could be like yours- her resting HR is as low as 40bpm
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Increased Stroke Volume…
• Stroke Volume is the amount of blood pumped by the heart per beat.
• When a person exercises regularly, Stroke volume increases; both at rest and at work.
• At rest it can be 85ml.
• At work stroke volume could be 130ml: half a cup of water every beat!
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Cardiac Output Increases…
• Cardiac Output is the amount of blood ejected from the heart in one minute.
• It is governed by the heart rate (pulse) and stroke volume.
• The equation to calculate cardiac output is…
Cardiac Output
(CO)
Stroke Volume
(SV)
Heart Rate
(HR)
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Blood Pressure Reduces…• Regular exercise reduces blood pressure.
• Exercise can help with weight loss.
• Extra weight puts strain on the heart and increase blood pressure.
• Factors which can affect blood pressure are age, sex, muscular development, stress and tiredness.
• Is there anything else that can affect it?
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Healthy Veins and Arteries…
• Fitness increases the number of capillaries within the heart muscle.
• It also makes blood vessels more flexible and efficient.
• What happens if you have a heart attack?
![Page 13: The Benefits of exercise on the CV System.](https://reader035.fdocuments.us/reader035/viewer/2022062408/5681301c550346895d9598bd/html5/thumbnails/13.jpg)
Exam Question…
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Recap…
• All of you: will understand the benefits of regular exercise on the CV system.
• Most of you: Will understand the key terms Cardiac Output and Stroke Volume when talking about the CV System.
• Some of you: Will be able to attempt the exam style question at the end of the session.