body levers in sport

 

 

in ball games such as tennis, cricket, baseball, golf and hockey
racquets, bats, clubs and sticks are used as levers

 

when a tennis ball is served, the arm and tennis racquet work together as a third class lever and speed multiplier
the shoulder acts as the fulcrum
the effort is by the muscles of the upper arm
the load is at the centre of the racquet

 

height is an advantage to tennis players and cricket bowlers

 

 

 

when a football is kicked, bones in the lower leg act as a third class lever and speed multiplier

 

the knee is the fulcrum
the effort is by the muscles of the lower leg
the load is the resistance to the football

 

 

when muscles are inactive, they are less elastic, and can be easily torn when sudden movements are made.
so before any strenuous activity or sports, warming up is necessary
and so is cooling down after

 

check out
http://www.dynamicscience.com.au/tester/solutions/hydraulicus/humanbody.htm

 

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