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Joints and the Musculo-Skeletal System

Major skeletal muscles in sporting actions

  • 3 things to know
  • Components 1 and 2

Overview

Skeletal muscle and its functions, and the pectoralis major, deltoid, trapezius, latissimus dorsi, erector spinae, abdominals, biceps, triceps, gluteus maximus, quadriceps, hamstrings, tibialis anterior, gastrocnemius and soleus in action.

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Key term

What are the main features and functions of skeletal muscle?

Key term

What are the main features of skeletal muscle?

Key term

What are the functions of skeletal muscle?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What are the main features of skeletal muscle?

    Model answer

    Skeletal muscle is voluntary muscle under conscious control. Skeletal muscle is attached to bones by tendons and contracts to pull on them.

  2. 2

    What are the functions of skeletal muscle?

    Model answer

    Skeletal muscle produces movement and maintains posture. Skeletal muscle also generates heat as it contracts.

  3. 3

    Which muscle draws the arm across the chest in a tennis forehand?

    Model answer

    The pectoralis major draws the arm across the chest, horizontally adducting the shoulder. The pectoralis major also drives the upward push of a bench press.

  4. 4

    What is the main action of the deltoid, and when does a volleyball player use it?

    Model answer

    The deltoid raises the arm at the shoulder, abducting it sideways and helping to flex it forwards. A volleyball player reaching up to block uses the deltoid.

  5. 5

    Which muscle draws a rower's shoulder blades together at the finish of the stroke?

    Model answer

    The trapezius draws the shoulder blades together. The trapezius also stabilises the shoulder blades and extends the neck.

  6. 6

    What does the latissimus dorsi do in front crawl?

    Model answer

    The latissimus dorsi pulls the arm down and back at the shoulder. The action powers the underwater pull of front crawl.

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AA larger base of support makes a performer more stable.
BA gymnast widens the feet on landing to avoid stepping.
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Flexion means a decrease in the angle at a joint.
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