1 / 24

VCE PE

VCE PE. Exam Preparation 2. Food To Energy. Food Fuels for Energy. Carbohydrates (CHO) – Preferred source of fuel during exercise (Glycogen) Fat – Concentrated fuel used during rest and prolonged sub-maximal exercise. Protein – Used for growth and repair (Negligible use during exercise).

ahmed-odom
Download Presentation

VCE PE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. VCE PE Exam Preparation 2

  2. Food To Energy

  3. Food Fuels for Energy • Carbohydrates (CHO) – Preferred source of fuel during exercise (Glycogen) • Fat – Concentrated fuel used during rest and prolonged sub-maximal exercise. • Protein – Used for growth and repair (Negligible use during exercise) p.87 VCE Physical Education - Unit 3

  4. VCE Physical Education - Unit 3

  5. Vitamins and Minerals Vitamins assist: Point 3 • Red Blood Cell Production • Tissue Repair • Protein Synthesis Minerals: Iron: Absorbed in the blood and assists in the production of haemoglobin Calcium: Major component of bones and teeth. Plays a part of muscle contraction and nerve transmission

  6. Sports Nutrition Pre Event Meal (point 10-11) • 1-4 hours prior to event • Low GI foods (sustain energy) • Low Fat and Protein: Ease digestion and avoid stomach upset. Post Event Meal Restore Muscle glycogen as quickly as possible. High GI foods (1g per 1kg of body weight within 30min of event). Can take 24hours to fully restore glycogen following event.

  7. Test Yourself • Answer Multiple Choice Questions 1-9 • 1 C, 2 A, 3 D, 4 C, 5 A, 6 B, 7 A, 8 D, 9 C

  8. Energy Systems

  9. ATP-PC System

  10. Lactic Acid System

  11. Aerobic System

  12. Common Mistake • The three energy systems do not turn on and off like a traffic light. • They are always interactive– the relative contribution of each system varies depending on factors such as intensity, type of activity and duration. X VCE Physical Education - Unit 3

  13. Interplay Between Energy Systems All activities use some energy from all three systems. The energy systems overlap – they never work independently. It it’s the relative contribution of each system that varies. VCE Physical Education - Unit 3

  14. Anaerobic v Aerobic Contributions VCE Physical Education - Unit 3

  15. Key Points • Accumulation of Hydrogen Ions: Hydrogen Ions are a By-Product of the Lactic Acid System (anaerobic glcolysis). H+ cause the muscle pH to drop (become more acidic). This inhibits the glycolytic enzymes and makes contractions difficult.

  16. Maximal Oxygen Uptake • The maximum amount of oxygen per minute that can be transported to, taken up and used by the body for energy production. Measured as mL/kg x min

  17. Test Yourself • Answer Short Answer Question Answer a/ ATP-PC System b/ 50% c/ You can work at a percentage greater than 100% VO2 Max by working anaerobically. d/ The test Percentage is different because it is not at maximal intensity, unlike a 400m race.

  18. Complete Multiple choice Questions • Question 1-9 Answers 1 B, 2 D, 3A, 4 C, 5 C, 6 B, 7 A, 8A, 9C

  19. Fatigue and Recovery • Fatigue occurs when the body is unable to function at it’s optimum level. Energy levels are depleted.

  20. Causes of Fatigue

  21. Effects of Fatigue • Increased Body Temp: Blood is directed away from the working muscles for cooling. Results in reduced blood and oxygen to the working muscle. • Dehydration: Can result in impaired performance (Blood flow away from working muscles). Blood plasma volumes decrease. To maintain Q, HR must increase.

  22. RECOVERY • Active Recovery (cool down): Low intensity exercise to continue movement of blood from working muscles (avoid blood pooling). • Passive Recovery: Best to replenish PC stores as more o2 available to replenish. • Lactic Acid Breakdown: 50% removal in 30min (halved with active recovery) 95% removal in 30min with an active recovery

  23. Test Yourself • Answer Multiple Choice 1-8 • Answers 1 D, 2 A, 3A, 4C, 5C, 6D, 7A, 8B

  24. Short Answer Ques 9 a/ The athlete is restoring Muscle glycogen b/ This should be eaten in the first 30 minute following a race. c/ To promote muscle repair and growth d/ Best fuel source is High GI Carbs as the provide a fuel source that can be used immediately.

More Related