Muscle Contractions Exploration

Year Level

Year 11

Duration

30 minutes

Class Size

20 students

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Curriculum Alignment

NSW PDHPE Stage 6 Syllabus - Core Content: The Body and Mind in Motion

• Content Focus: The body and mind in motion
• How do the systems of the body influence and respond to movement?
• Explain the interrelationship between the skeletal and muscular systems and movement
• Types of muscle contractions and muscle relationships
• Antagonist, agonist muscles
• Isometric, eccentric, and concentric contractions

Learning Outcomes:

• Analyse how the skeletal and muscular systems interact to produce movement
• Investigate different types of muscle contractions and their roles in movement
• Describe muscle relationships, particularly agonist and antagonist roles during movement
• Collect and analyse data relating to muscle activity in physical skills

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Lesson Objectives

By the end of this lesson, students will be able to:

1. Explain the role of skeletal and muscular systems in producing physical movement.
2. Identify and describe the types of muscle contractions: concentric, eccentric, and isometric.
3. Describe the relationship between agonist and antagonist muscles during movement.
4. Apply investigative methods to explore muscle contractions and relationships by performing and analysing a physical skill.

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Resources Needed

• Open space in classroom or gym for movement
• Whiteboard and markers
• Anatomy diagrams or models showing skeletal and muscular systems
• Equipment for simple movements (e.g., resistance bands, light dumbbells) optionally
• Worksheets for recording observations and reflections
• Stopwatch or timer

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Lesson Outline

1. Introduction and Activation (5 minutes)

• Warm-up Discussion: Ask students to recall how muscles and bones work together when they perform movements like bending their arm or jumping.
• Learning Intentions: Share lesson objectives emphasizing investigation and understanding of muscle contractions and relationships.
• Quick Reinforcement of Key Terms:
• Agonist: muscle causing the movement
• Antagonist: muscle opposing the movement
• Types of contractions: concentric, eccentric, isometric

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2. Investigative Activity Part 1: Movement Skill Exploration (10 minutes)

• Skill Demonstration: Teacher demonstrates a simple movement involving visible muscle contractions such as bicep curl or calf raise.
• Student Performance: Students perform the movement slowly and then at normal speed, in pairs.
• Investigation Focus: Students observe and record answers to key questions on worksheets:
• Which muscle is contracting to produce the movement? (Agonist)
• Which muscle is relaxing or lengthening? (Antagonist)
• What type of muscle contraction occurs during each phase?
• Upward phase: likely concentric contraction of agonist
• Downward phase: eccentric contraction of agonist
• Static hold: isometric contraction

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3. Classroom Discussion and Concept Clarification (7 minutes)

• Facilitate a discussion using student observations:

• Review definitions of concentric, eccentric, and isometric contractions with examples from the movement.

• Discuss agonist and antagonist roles during the movement.

• Clarify how the skeletal system provides the framework for these muscle actions.

• Use diagrams or models to link muscle actions to bone movements at joints.

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4. Investigative Activity Part 2: Muscular Relationships Application (5 minutes)

• Paired Challenge:
  • Each pair selects one lower-body movement to analyse (e.g., squat, lunge, deadlift).
  • Briefly describe the chosen movement.
  • Answer the following questions based on your selected movement:
    • What joint movements occur during the movement?
    • Which muscles act as the agonist(s)?
    • Which muscles act as the antagonist(s)?
    • Which muscles act as stabilisers?
    • Identify the types of muscle contractions (concentric, eccentric, isometric) during different phases of the movement.
  • Record your findings on the worksheet for class sharing.

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5. Reflection and Consolidation (3 minutes)

• Students reflect individually or in pairs on:

• How understanding muscle contractions and relationships helps improve movement performance and prevent injury.

• Real-life examples of when different types of contractions might be used in sport or physical activity.

• Teacher summarises key points and links to future learning about body systems’ role in movement and performance.

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Assessment

• Formative:

• Observation of student participation during activities.

• Completion and accuracy of worksheets describing muscle contractions and relationships.

• Responses during class discussion demonstrating understanding.

• Summative Preparation:

• Use investigative worksheet responses as evidence of understanding for monitoring progress.

• Inform future assessment tasks on body systems and movement principles per NSW syllabus.

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Differentiation and Engagement

• Support students who may need help by providing labelled diagrams and key term cards.
• Challenge advanced students to explain why muscle contractions differ in speed and force during different activities.
• Incorporate peer teaching in pairs to deepen understanding.

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Safety Considerations

• Ensure all movements are performed with correct technique and control to avoid injury.
• Modify movements for students with physical limitations.
• Warm-up before activity and cool down if time in extended lesson.

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Notes for Teachers

• This lesson integrates biological understanding with practical physical activity, promoting kinesthetic learning.
• Encourages scientific inquiry skills in a physical education context, fostering investigation and analysis.
• Aligns precisely with NSW PDHPE syllabus outcomes relating to body systems and movement.

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This lesson meets key learning requirements for NSW Year 11 PDHPE within the "Body and Mind in Motion" unit, emphasising the interrelationship of muscular and skeletal systems through active investigation and applied skill performance.