Movement Analysis Flashcards
what is the fulcrum
the part of a lever system that pivots; joints are the fulcrums in the body’s lever system
what is the resistance arm (load)
the load to be moved by a lever system; usually this involves weight when the body’s lever systems are involved
what is the effort arm
the force applied to move the resistance or weight; in the body, the effort is provided by muscles exerting a force
what is a first class lever
found at the elbow joint, where the triceps causes extension of the lower arm
give an example of a first class lever system
football throw in
what is a second class lever system
found at the ankle, where the gastrocnemius causes plantar flexion
give an example of a second class lever system
a calf raise
what is a third class lever system
the majority of the body’s joints acts as third class levers; for example, the biceps acting at the elbow to cause flexion acts as a third class lever system
give an example of a third class lever system
bicep curl
123=?
FLE
what is an agonist
the prime mover - muscle that causes movement
what is an antagonist
muscle that relaxes to allow the agonist to contract
what is an isotonic movement
muscle action where the muscle changes length - causes movement
what is an isometric movement
muscle action where the muscle stays the same length - used in balances
what is a concentric movement
an isotonic contraction where the muscle shortens
