Lecture Notes: Understanding the Three Energy Systems

Introduction

• Speaker: Mr. D
• Focus: Understanding how energy systems enable human feats like Ash Pranama Pika Alto's record for running 5000 km in 40 days and 9 hours.
• Learning Objectives:
  • Identify the scientific word for energy.
  • List the three energy systems.
  • Know duration of each system.
  • Provide activity examples for each system.

Defining Key Terms

• Energy: The ability to do work.
• Systems: A set of connected things.
• Source of Energy: Food, which is converted into ATP, chemical waste, carbon dioxide, water, and heat.

ATP: The Energy Currency

• Adenosine Triphosphate (ATP): The scientific term for energy in the body.
• Function of Energy Systems: All produce ATP to fuel the body.

The Three Energy Systems

1. ATP-PC System

   • Duration: Less than 10 seconds.
   • Intensity: High intensity.
   • Example: 100-meter sprint.

2. Lactic Acid System

   • Duration: 30 seconds to 3 minutes.
   • Intensity: Medium to high intensity.
   • Example: Weightlifting, circuit training, 400-meter race.

3. Aerobic System

   • Duration: From 3 minutes to indefinite.
   • Intensity: Lower intensity.
   • Example: Marathon running, swimming.
   • Why Unlimited: Uses oxygen, allowing it to sustain over a long period given adequate food and no injuries.

How Energy Systems Work Together

• Diagram Description:
  • Y-axis: Intensity (0 to 100%).
  • X-axis: Time (10 seconds and beyond).
  • Progression:
    • ATP-PC system dominates in the first 10 seconds.
    • Lactic acid system takes over up to 3 minutes.
    • Aerobic system sustains energy beyond 3 minutes.

Review and Success Criteria

1. Scientific Name for Energy

   • Answer: Adenosine Triphosphate (ATP).

2. Listing the Three Energy Systems

   • 1. ATP-PC system.
   • 2. Lactic acid system.
   • 3. Aerobic system.

3. Duration of Each System

   • ATP-PC: Less than 10 seconds.
   • Lactic Acid: 30 seconds to 3 minutes.
   • Aerobic: 3 minutes and up.

4. Activity Examples

   • ATP-PC: 100-meter sprint.
   • Lactic Acid: Weightlifting, 400-meter sprint.
   • Aerobic: Marathon running, swimming.

Conclusion

• Encouragement: Review the material if needed to fully understand the energy systems.
• Engagement: Like, comment, and subscribe for more topics in PE.