Movements Analysis Flashcards
What is a lever
Rigid bar that turns around the fulcrum to create movement. (BONES)
What is the load
The weight or resistance that the lever must move.
What is the effort
The force required to move the load. (MUSCLES)
What is the fulcrum
The point at which the lever turns or is supported. (JOINTS)
Explain what is meant by F L E? 1 2 3
First-class lever has the fulcrum in the middle
Second-class lever has the lever in the middle
Third-class lever has the effort in the middle
First-class levers in the body (2) and an example in sport
-The neck joint
-The elbow !when extending!
-Heading the ball in football
-Boxing
Second-class levers in the body (1) and an example
-The ankle joint. (Plantar flexion)
-Any jumping action
Third-class levers in the body (2) and an example
-The elbow
-The knee
-Kicking a ball
-Running
-Jumping
What are the symbols used when drawing levers?
Effort - arrow
Load - square/rectangle
Fulcrum - triangle
What is an axis
A line about which a body part can turn.
What is the effort arm
Where the force is applied to the lever.
What is the load arm
It moves the weight or resistance.
How do you calculate the mechanical advantage
Effort arm/ Load arm
What is a mechanical advantage
When the effort arm is greater than the load arm.
What is a mechanical disadvantage
When the load arm is greater than the effort arm.
What is a frontal plane
Divides the body into front and back halves.
What is a sagittal plane
Divides the body into sides (left and right)
What is a transverse plane
Divides the body into top and bottom.
What is a plane
An imaginary flat surface through the body.
What is a transverse axis
It passes through the hips like a table football player.
What is a longitudinal axis
It passes vertically from top to bottom.
What is a sagittal axis
It passes through the belly button
Which direction is the effort pointing in a first-class lever
Downwards.
Which direction is the effort pointing in a second and third-class lever
Upwards.
