PE34 Revision Lecture

Introduction

• Lecturer: Angelica
• Background: ATI notes founded in 2007 to help students with VC.
• Format: Originally in-person, now online.
• Personal Experience: Angelica used ATI in high school, participated actively in forums, attended lectures.
• Resources Available: Study notes, videos, newsletters, ATAR calculator, articles, etc.

Angelica's Profile

• Graduated 2019 with ATAR 97.25
• High study scores: Bio 49, PE 40, English 47
• Completed Biomedical Science at Monash
• Studying Medicine at Monash

Unit 3 Topics Covered

• Movement skills, coaching, practice and feedback
• Biomechanics
• Energy Systems
• Acute responses

ATP (Adenosine Triphosphate)

• Significance: Energy currency of the cell
• Structure: Adenosine + 3 phosphate molecules
• Function: Provides energy for muscular contractions
• Energy Systems: ATP-PC, Anaerobic Glycolysis, Aerobic System

Energy Systems Overview

1. ATP-PC System

   • Uses phosphocreatine as fuel
   • Produces energy rapidly for short duration
   • Suitable for high-intensity, short-duration activities

2. Anaerobic Glycolysis System

   • Uses carbohydrates (glycogen)
   • Functions without oxygen
   • Produces lactic acid, leading to fatigue
   • Suitable for medium-duration, high-intensity activities

3. Aerobic System

   • Uses carbohydrates and fats
   • Functions with oxygen
   • Produces more ATP but slower
   • Suitable for low-intensity, long-duration activities

Fatigue and Recovery

• Causes of Fatigue: Fuel depletion, accumulation of byproducts, elevated body temperature
• Recovery Methods: Active recovery (low-intensity activity), Passive recovery (rest)

Acute Responses to Exercise

Respiratory Responses

• Increased Respiratory Rate: More air intake
• Increased Tidal Volume: More air per breath
• Increased Ventilation: Total air inhaled per minute
• Increased Pulmonary Diffusion: Gas exchange efficiency

Cardiovascular Responses

• Increased Heart Rate: More blood circulation
• Increased Stroke Volume: More blood per heartbeat
• Increased Cardiac Output: More blood per minute
• Increased Blood Pressure: Systolic pressure increase

Muscular Responses

• Increased Motor Unit Recruitment: More muscle force
• Increased Body Temperature: Due to chemical reactions
• Increased Production of Byproducts: Lactic acid and hydrogen ions

Study Tips

• Use VCE Resources: VCAA past exams and reports
• Practice Exams: Aim for at least 20 for familiarity
• Active Study: Flashcards, forums, and active recall
• Manage Time: Focus on quality study sessions

Conclusion

• Encouragement to use available resources and practice regularly.
• Reminder to reach out for help via forums or email if needed.