analysis of movement Flashcards
what is mechanicl work?
force x displacement or
muscles tension x ROM
what is physiological work?
energy expenditure
what two contractions are associated with static work?
- isometric
- co-contractions
what five contractions are associated with dynamic work?
- concentric
- eccentric
- isokinetic
- isoinertial
- isotonic
definition of static work
no mechanical work
- contractions associated with energy expenditure
- joint position maintained
definition of dynamic work
mechanial wokr performed
-joint motion occurs
isometric contraction
muscles length remains constant
co contraction
simultaneous contraction of agonistic-antagonistic muscles
concentric contraction
- muscles shortens
- positive distance
- positive muscle work
eccentric contraction
- muslces lengthens
- negative distance
- negative muslces work
is the action parallel to line of gravity?
- no = concentric
- yes= new question
if the action is parallel to line of gravity, is it in the opposite direction of gravity?
- yes= concentric
- no= new question
if action is in the same direction of gravity, is it moving downwards faster than normal?
- yes= concnetric
- no= eccentric
isokentic contraction
constant velocity of joint motion
isoinertial contraction
constant external load
ex. wt lifting
