Levers, resistance and exercise

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Levers, resistance and exercise

  1. 1. Lloyd Dean Levers, Resistance & Gravity
  2. 2. Aims <ul><li>By the end of the lesson you should be able to: </li></ul><ul><li>List the different types of lever </li></ul><ul><li>Describe how gravity and resistance can effect exercise </li></ul><ul><li>Apply an example from sport to each of the above </li></ul>
  3. 5. <ul><li>http://www.youtube.com/v/F6svFMPSczg&feature=related </li></ul>
  4. 6. A Fatman Introduction
  5. 7. Levers <ul><li>What are they? </li></ul><ul><li>A long rigid rod that turns about a pivot or fulcrum </li></ul><ul><li>What would they be in the body? </li></ul><ul><li>Usually a bone (lever) that is turning about a joint (fulcrum) </li></ul><ul><li>3 types, arrangement of each part determines lever classification </li></ul>
  6. 8. 1 st Class Lever <ul><li>Fulcrum is between the </li></ul><ul><li>effort and load </li></ul><ul><li>See saw approach </li></ul><ul><li>The neck is a typical example </li></ul><ul><li>Resistance comes from head, with muscles in the neck giving the effort. Pivot Joint! </li></ul>
  7. 9. 2 nd Class Lever <ul><li>Fulcrum at one end, </li></ul><ul><li>effort at the other end & </li></ul><ul><li>load is in between </li></ul><ul><li>Wheel Barrow </li></ul><ul><li>Standing calf raises in exercise </li></ul><ul><li>What impact would a heavier weight have? </li></ul>
  8. 10. 3 rd Class Lever <ul><li>The most commonly found in the </li></ul><ul><li>body </li></ul><ul><li>Fulcrum at one end, lever at </li></ul><ul><li>the other end and effort in </li></ul><ul><li>between </li></ul><ul><li>Similar to holding bag of sugar </li></ul><ul><li>Biceps curl (Think of muscle attachment!) </li></ul><ul><li>How can gravity effect this lever? </li></ul><ul><li>http://cwx.prenhall.com/bookbind/pubbooks/martinidemo/chapter11/medialib/CH11/fig_html/fig11_2a.html </li></ul>
  9. 12. Task <ul><li>How Can The Following Exercises Be Made Easier or More Difficult? </li></ul><ul><li>When applying your knowledge of levers, how can the exercises be made more difficult or easier? Give two different exercises below and explain how to make (1) Easier, (2) Harder. </li></ul>
  10. 16. Aims <ul><li>You should now be able to: </li></ul><ul><li>List the different types of lever </li></ul><ul><li>Describe how gravity and resistance can effect exercise </li></ul><ul><li>Apply an example from sport to each of the above </li></ul>

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