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Levers, resistance and exercise

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Transcript

  • 1. Lloyd Dean Levers, Resistance & Gravity
  • 2. Aims
    • By the end of the lesson you should be able to:
    • List the different types of lever
    • Describe how gravity and resistance can effect exercise
    • Apply an example from sport to each of the above
  • 3.  
  • 4.  
  • 5.
    • http://www.youtube.com/v/F6svFMPSczg&feature=related
  • 6. A Fatman Introduction
  • 7. Levers
    • What are they?
    • A long rigid rod that turns about a pivot or fulcrum
    • What would they be in the body?
    • Usually a bone (lever) that is turning about a joint (fulcrum)
    • 3 types, arrangement of each part determines lever classification
  • 8. 1 st Class Lever
    • Fulcrum is between the
    • effort and load
    • See saw approach
    • The neck is a typical example
    • Resistance comes from head, with muscles in the neck giving the effort. Pivot Joint!
  • 9. 2 nd Class Lever
    • Fulcrum at one end,
    • effort at the other end &
    • load is in between
    • Wheel Barrow
    • Standing calf raises in exercise
    • What impact would a heavier weight have?
  • 10. 3 rd Class Lever
    • The most commonly found in the
    • body
    • Fulcrum at one end, lever at
    • the other end and effort in
    • between
    • Similar to holding bag of sugar
    • Biceps curl (Think of muscle attachment!)
    • How can gravity effect this lever?
    • http://cwx.prenhall.com/bookbind/pubbooks/martinidemo/chapter11/medialib/CH11/fig_html/fig11_2a.html
  • 11.  
  • 12. Task
    • How Can The Following Exercises Be Made Easier or More Difficult?
    • 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.
  • 13.  
  • 14.  
  • 15.  
  • 16. Aims
    • You should now be able to:
    • List the different types of lever
    • Describe how gravity and resistance can effect exercise
    • Apply an example from sport to each of the above