Movement analysis Flashcards
lever systems + planes and axis (17 cards)
what does a lever system consist of?
-fulcrum
-effort
-load
1st class lever
-fulcrum is always in the middle
-heading a ball in football
-effort- neck/back muscles
-fulcrum- joint between cranium and vertebrae
-load- weight of head/ ball
2nd class lever
-load is always in the middle
-takeoffs at the ankle
-fulcrum- toe joints
-load- body weight
-effort- force of gastrocnemius
3rd class lever
-effort is always in the middle
-bicep curl (flexion at the elbow)
-load- weight of arm + weight
-effort- force of biceps
-fulcrum- elbow joint
for 1,2,3 think…
F,L,E
mechanical advantage
Levers are used to multiply force, In other words, using a lever gives you greater force or power than the effort you put in.
In a lever, if the distance from the effort to the fulcrum is longer than the distance from the load to the fulcrum, this gives a greater mechanical advantage.
which levers provide the most mechanical advantage
second class levers
what are the three planes of movement
frontal
transverse
saggital
what is the formula for mechanical advantage
mechanical adv= effort arm/weight arm
Frontal plane
-divides body into front and back
-abduction and adduction movements occur here
saggital plane
-divides body into left and right
-flexion and extension movements occur here
transverse plane
-divides body into top and bottom
-rotation occurs at this plane
movements occur ________ to the plane in which they take place
parallel
what are the three axis of movements
-transverse
-frontal
-longitudinal
frontal axis
runs through the body front to back
longitudinal axis
runs through body head to toe
transverse axis
runs from left to right through centre of body
