Exploring Respiration in Sports (1).pptx

Respiration in Sports

1. Exploring Respiration in Sports Monday, 16 October 2023 LI : To learn about the type respiration occurring in different sporting activities

2. Success Criteria: Describe what is meant by anaerobic respiration. Explain why some sports involve more aerobic or more anaerobic respiration. Explain what is meant by oxygen debt.

3. Quick Check FIGURE  2.1.14b: Why does a circuit trainer need to use anaerobic respiration? Jogging, swimming, long distances; etc sprinting, weightlifting Aerobic respiration uses oxygen; anaerobic respiration does not Any sports that require steady exercise as well as short bursts of energy e.g football, basketball

4. Starter Activity produces carbon dioxide releases more energy releases energy more slowly uses oxygen produces lactic acid releases less energy releases energy more quickly results in oxygen debt

5. Use of energy in organisms STARTER ACTIVITY Using the images, identify some uses energy in organisms .

6. Germination Cell division Use of energy in organisms Protein synthesis Muscle contraction Growth The passage of nerve impulses Keeping body temperature constant

7. Anaerobic respiration happens in our muscles, during hard exercise, when oxygen is not delivered to them fast enough. It can be represented as: Glucose  Lactic Acid + Energy Anaerobic Respiration in Mammals If lactic acid builds up in the body, it stops the muscles from working and causes a cramp. 

8. Teacher Explanation When athletes need to sprint, they cannot get enough oxygen to respire in the usual way . They need to work without oxygen for a short time , but also must release the energy that allows them to run. R espiration which occurs without oxygen is anaerobic respiration . The body has mechanisms to manage without oxygen but there are consequences.

9. Aerobic vs Anaerobic Respiration When someone exercise steadily, for example jogging or swimming, they gain enough oxygen to carry out aerobic respiration . More aerobic respiration

10. Aerobic vs Anaerobic Respiration However, when they exercise in short, energetic bursts; the energy needed outweighs the oxygen that they can take in and they have to respire without oxygen. This type of respiration, without oxygen, is called  anaerobic respiration . Anaerobic respiration is important in sprinting and weightlifting . Other sports, which involve steady exercise as well as short bursts of high-energy exercise, rely on both aerobic and anaerobic respiration. More anaerobic respiration

11. Aer obic exercise A n aerobic exercise AIR N NO oxygen! With O2

12. Aerobic exercise Aerobic exercise need a sufficient supply of oxygen to the tissues. Work for a long time Moderate – hard work Periods of more then 60s Glucose + Oxygen CO2 + water + Energy Anaerobic exercise No oxygen is used in its initial release, energy is produced from the supplies already in the body. Maximum bursts of energy Time it takes to do is very short Glucose Energy + Lactic acid

13. Anaerobic respiration happens in our muscles, during hard exercise, when oxygen is not delivered to them fast enough. It can be represented as: Glucose  Lactic Acid + Energy Anaerobic Respiration in Mammals If lactic acid builds up in the body, it stops the muscles from working and causes a cramp. 

14. Lactic acid is poisonous and needs to be broken down by oxygen to allow muscles to return to normal. This oxygen is a ‘payback’ so that the body can rid itself of lactic acid. Lactic acid + oxygen  carbon dioxide + water Hence ‘ oxygen debt .’ Why do people tend to breathe deeply after exercise? Anaerobic Respiration in Mammals

15. Oxygen Debt Oxygen debt is the amount of oxygen needed at the end of a physical activity to break down lactic acid It occurs when the body reaches a state of anaerobic respiration during intense exercise . .

16. Oxygen Debt Usually, after a 400m race lactic acid is built up as oxygen is not being used. Oxygen is repaid through deep gasping breaths at the end of exercise.

17. Learning Check Point oxygen energy glucose sprinting

18. Respiration in athletics   The blood of an athlete was tested before, during and after a 400m race: TASK – explaining muscle fatigue and oxygen debt Extension Activity

19. Complete the following table about each section of the race: Section of race Strategy Anaerobic or aerobic respiration? Explanation A to B Sprint start Anaerobic respiration Sudden increase in exercise, not enough oxygen, respires anaerobically, produces lactic acid, and causes increase in lactic acid levels.   B to C Stops accelerating and maintains pace     C to D Sprint finish             D to E (after the race has finished) Warm down, then rest            

20. Plenary