The document discusses levers in the body and how exercises can be modified to increase or decrease difficulty. It defines the three classes of levers and provides examples like the neck as a first class lever and bicep curls as a third class lever. Gravity and resistance can affect levers by making the exercise easier or harder. Specific exercises are not given, but the document explains how knowledge of levers can inform modifying exercises to make them more difficult by increasing resistance or easier by decreasing resistance.

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

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

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.

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