Session 12 (muscle contractions)

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  • 1. Session 12 Anatomy & Physiology For Sport Muscular Contractions

2. Session Aim/Objectives

  • Aim
  • Bythe end of this learning outcome you will
  • successfully achieve your target grade in the muscular section of
  • the assignment
  • Objectives
  • By the end of the session you will be able to:
  • Identify the bones, joints and antagonistic muscle pairings of simple sports exercises
  • 2. Explainthe termseccentric, concentric andisometric muscular contractions
  • 3. Identifying the type of muscular contractions occurring in simple sports exercises

3. Recap tasks

  • Gapped Handout
  • List pairs without any notes or prompts
  • Yesterdays handout Agonist/Antagonist

4. Gapped Handout

  • Pls / L.s .i
  • ..r dds /r d..ds
  • Trz..s / De.s
  • Er.. Spin.. / R..t.s abs
  • Right e...l ob..es / Left el ob..es
  • Hgs / Q..ps
  • Gas..us / Ti.s anterior
  • T.s / s

5. Gapped Handout Answers

  • Pectorals / Latissimuss Dorsi
  • Anterior deltoids / Posterior deltoids
  • Trapezius / Deltoids
  • Erector spinae / Rectus abdominus
  • Right external obliques / Left external obliques
  • Hamstrings / Quadriceps
  • Gastrocnemius / Tibialis anterior
  • Triceps / Biceps

6. Agonist or Prime Mover (Biceps contract)

  • Themuscle doing the work (contracting) and creating themovement is called theagonistorprime mover.

Antagonist (Triceps relax)

  • The muscle which is relaxing and letting the movement take place is called theantagonist.

7. Task 1

  • Move around the room to analyse 3 exercises
  • Complete the blank movement tableon the flip chartpaper.
  • Each member of the group using one colour pen to insert their answers
  • 10 minutes allowed

8. Muscle Contraction

  • Isotonic or concentric contraction
  • Muscle length shortens during contraction

9. Muscle Contraction

  • Eccentric contraction
  • Muscle lengthens under tension

10. Muscle Contraction

  • Isometric
  • Muscle length stays the same during contraction
  • Example holding a press up position

11. 12. Task 2

  • Pairs decide on and write out a definition forthe 3 types of contraction:-
  • 1.Concentric
  • 2.Eccentric
  • 3.Isometric contractions
  • Extension task -Look at the diagrams below what type ofcontractions is occurring on the agonist and antagonists.?
  • Press up
  • (upward phase -Upper arms)Sit up(Upward Phase - Stomach)

13. Task 3

  • Using the movement tables you started in task 1
  • Add the type of contractions in the agonists and antagonistsfor each skill
  • Extensionquestion.
  • What sports skills require isometric muscular contractions?

14. Summary

  • Objectives achieved?
  • Can you:
  • 1.Identify the bones, joints and antagonistic muscle pairings of simple sports exercises?
  • 2.Explain the termseccentric, concentric andisometric muscular contractions?
  • 3.Identify the type of muscular contractions occurring in simple sports exercises?
  • Next Session the effects of exercise on the muscular system