Kin 405 lecture 9

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Unformatted text preview: Assessing'Strength'and'Muscular' Endurance' •  Review as needed from Muscle Physiology Strength'and'Endurance'Tes4ng' !  Strength: ◦  Test the ability to generate maximal contractile force against the resistance for a single contraction ◦  no extraneous body movement !  Endurance: ◦  Test the ability for a muscle (group) to exert submaximal force over a period of time OR ◦  Rate of /or amount of decrement in force (final / initial) over a fixed duration Strength & endurance can be assessed for static & dynamic contractions !  Isometric Contraction: –  Iso = same; metric = length –  Immoveable resistance where there is no visible joint movement •  Dynamic Contraction: –  visible joint movement –  Concentric, eccentric, isokinetic Isometric'tests:'Sta4c'Strength'and' Endurance'Tes4ng' •  Dynamometers, cable tensiometers, load cells •  Testing procedures depend on type of test and on equipment •  Hand dynamometer –gripping, adjust according to hand size, spring. –  Often used in clinical settings and related to clinical outcomes Dynamic contractions •  Concentric contractions –  Muscle shortening (arm curl – decreasing joint angle) •  Eccentric contractions –  Muscle lengthening (arm curl – increasing joint angle) •  In theory, these are isotonic contractions –  The weight lifted is constant while torque changes –  HOWEVER, due to changes in musc...
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  • Fall '12
  • MarinaMourtzakis
  • Endurance, Cardiovascular Endurance, muscle group

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