Movement Analysis Flashcards
What’s an example of a first class lever?
The joint between the skull and the first vertebrae
What’s an example of a second class lever?
Heel joint
What’s an example of a third class lever?
Elbow joint
How do you remember the lever classes?
123 FLE
1 = Fulcrum in middle
2 = Load in middle
3 = Effort in middle
What lever class is plantar flexion?
2nd class
Which is the most common lever class?
3rd class
(guess 3rd class if u don’t know)
What’s the load arm?
Distance from the fulcrum to the load
What’s the effort arm?
Distance from the effort to the fulcrum
How does mechanical advantage relate to the lever system?
When a lever’s effort arm is longer than its load arm, it has a high mechanical advantage
What does it mean to have a high mechanical advantage?
Levers can overcome large loads, requiring relatively low effort
What are the disadvantages of having a high mechanical advantage?
- Short range of motion at the joint
- Limited speed
What lever has the highest mechanical advantage?
2nd class lever
In which lever system does the effort usually act down?
1st class lever
What’s the equation for mechanical advantage?
Effort arm/load arm
What’s the plane for flexion and extension? + sporting example
Sagittal plane: Gymnast doing a forward roll (flexion at the hip joint and knee joints)
What’s the plane for abduction/adduction?
Frontal plane: Gymnast doing a cartwheel (abduction + adduction of arms and legs)
What’s the plane for Rotation?
Transverse Plane: Golf Swing (rotation at hip joint)
What movement occurs at the Longitudinal axis? + sporting example
ROTATION - pirouette in dance
What movement occurs at the Transverse axis? + sporting example
FLEXION/EXTENSION - forward roll in gymnastics
What movement occurs at the Frontal axis? + sporting example
ABDUCTION/ADDUCTION - Cartwheel in gymnastics
Which muscle is the agonist during plantarflexion and dorsiflexion?
Plantarflexion: Gastrocnemius
Dorsiflexion: Tibialis anterior
Which muscle is the agonist when extending the knee?
Quadriceps
Which muscle is the agonist when the knee undergoes flexion?
Hamstrings
when is there a low mechanical advantage?
Effort arm shorter than resistance arm
what is the agonist in downward phase of a push up
triceps
what lever class is upward phase of a push up
1st
What’s the agonist and antagonist during upwards phase of a bicep curl?
Biceps - agonist
Triceps - antagonist
