Lloyd Dean Muscle Contraction
Aims <ul><li>By the end of the lesson you should be able to: </li></ul><ul><li>Describe the all or none law of muscle phys...
All or None Law <ul><li>To fire a gun there must be enough force to pull the trigger </li></ul><ul><li>If you pull the tri...
Muscle Fatigue & Oxygen Debt <ul><li>How do these both impact the muscle contraction? </li></ul><ul><li>If no ATP is avail...
Antagonistic Pairs Biceps – Prime mover  Triceps – Antagonistic This muscle determines the movement of an action –by  Cont...
Agonist, Antagonists and....... <ul><li>Synergists </li></ul><ul><li>Fixators </li></ul><ul><li>Help to steady the movemen...
Muscle contraction <ul><li>Three types </li></ul><ul><li>Isometric </li></ul><ul><li>Concentric </li></ul><ul><li>Eccentri...
Isometric Contraction <ul><li>Muscle stays the same length during Contraction or when the activity is being carried out. <...
Concentric Contraction <ul><li>This where the muscle shortens when performing an action </li></ul><ul><li>Name a sport/act...
Eccentric Contraction <ul><li>Where the muscle lengthens under tension – ends of the muscle move further away during an ac...
 
Muscle Tone <ul><li>Muscle tissue never really relaxes and is in constant partial contraction – this gives muscle its shap...
Review of aims <ul><li>You should now be able to: </li></ul><ul><li>Describe the all or none law of muscle physiology. </l...
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Muscle contraction types and all or none law

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Muscle contraction types and all or none law

  1. 1. Lloyd Dean Muscle Contraction
  2. 2. Aims <ul><li>By the end of the lesson you should be able to: </li></ul><ul><li>Describe the all or none law of muscle physiology. </li></ul><ul><li>State muscle fatigue and oxygen debt in relation to muscle contraction </li></ul><ul><li>List the types of muscle contraction </li></ul><ul><li>Describe agonists, antagonist, synergists and fixators applied to a range of exercises. </li></ul>
  3. 3. All or None Law <ul><li>To fire a gun there must be enough force to pull the trigger </li></ul><ul><li>If you pull the trigger harder the bullet does not travel faster! </li></ul><ul><li>A contracted muscle receives a nerve impulse either completely or not at all </li></ul><ul><li>The action potential (Nerve impulse) is at full strength or not at all </li></ul><ul><li>This is the All or None Law! </li></ul>
  4. 4. Muscle Fatigue & Oxygen Debt <ul><li>How do these both impact the muscle contraction? </li></ul><ul><li>If no ATP is available no contraction will take place </li></ul><ul><li>If you use more oxygen that is taken in through the lungs then there is a deficit of oxygen </li></ul><ul><li>This can make the blood PH level rise, and become acidic (Commonly know as an increase in Lactate acid) </li></ul><ul><li>This is a by product of exercises without oxygen, or anaerobically </li></ul>
  5. 5. Antagonistic Pairs Biceps – Prime mover Triceps – Antagonistic This muscle determines the movement of an action –by Contracting Biceps – Antagonistic Triceps – Prime Mover This muscle works with the prime mover but creates an opposing action – by relaxing
  6. 6. Agonist, Antagonists and....... <ul><li>Synergists </li></ul><ul><li>Fixators </li></ul><ul><li>Help to steady the movement </li></ul><ul><li>In biceps curl the brachialis helps the action </li></ul><ul><li>Assist in stabilising the origin of the agonist to ensure movement occurs </li></ul><ul><li>In biceps curl the fixators would </li></ul>
  7. 7. Muscle contraction <ul><li>Three types </li></ul><ul><li>Isometric </li></ul><ul><li>Concentric </li></ul><ul><li>Eccentric </li></ul>
  8. 8. Isometric Contraction <ul><li>Muscle stays the same length during Contraction or when the activity is being carried out. </li></ul><ul><li>Name a sport/activity where isometric contraction occurs? </li></ul>
  9. 9. Concentric Contraction <ul><li>This where the muscle shortens when performing an action </li></ul><ul><li>Name a sport/activity where Concentric contraction occurs? </li></ul>
  10. 10. Eccentric Contraction <ul><li>Where the muscle lengthens under tension – ends of the muscle move further away during an action </li></ul><ul><li>Name a sport/activity where Eccentric contraction occurs? </li></ul>
  11. 12. Muscle Tone <ul><li>Muscle tissue never really relaxes and is in constant partial contraction – this gives muscle its shape or tone. </li></ul>
  12. 13. Review of aims <ul><li>You should now be able to: </li></ul><ul><li>Describe the all or none law of muscle physiology. </li></ul><ul><li>State muscle fatigue and oxygen debt in relation to muscle contraction </li></ul><ul><li>List the types of muscle contraction </li></ul><ul><li>Describe agonists, antagonist, synergists and fixators applied to a range of exercises. </li></ul>
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