Topic 2 Movement Analysis Flashcards
what is the lever in the body
bone
what is the fulcrum in the body
joint
what is the effort in the body
the force from the muscle
what is the load
weight of the body part or the object being moved
fulcrum symbol
triangle
effort symbol
arrow pointing down
load symbol
square
lever symbol
line
first-class lever
the fulcrum in the middle
second class lever
load in the middle
third-class lever
effort in the middle
example of a first-class lever system
header
ball= load
fulcrum=atlas
effort=muscles in the head and neck
example of a second class lever system
calf raises/ preparing to shoot in netball
fulcrum=ball of the foot
load=weight of the body
effort=force from the gastrocnemius
example of a third-class lever system
bicep curl
fulcrum=elbow joint
load=weight being lifted
effort=force from the bicep
mechanical advantages
to move a load faster than it is possible without a lever
to move a heavier load with less force than without a lever
way to remember the systems
1,2,3
F,L,E
2nd class advantage
provides the force to lift heavy loads
2nd class disadvantage
a small range of movement and can’t move quickly
why does the 2nd class have these advantages and disadvantages
due to the load being closer to the fulcrum than the effort
3rd class advantage
provides speed and wide range of movement
3rd class disadvantage
the greater force required than the load to be moved
why does 3rd class have these advantages and disadvantages
due to the effort being closer to the fulcrum than the load
three types of plane
sagittal, frontal, transverse
three-axis of movement
sagittal, frontal, vertical
