CH4 Flashcards

BIOMECHANICS OF RESISTANCE EXERCISE

1
Q

LEVER

A

RIGID OR SEMI RIGID BODY THAT, WHEN SUBJECTED TO A FORCE WHOSE LINE OF ACTION DOES NOT PASS THROUGH ITS PIVOT POINT , EXERTS FORCE ON ANY OBJECT IMPEDING ITS TENDENCY TO ROTATE

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2
Q

FULCRUM

A

PIVOT POINT OF LEVER

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3
Q

MOMENT ARM

A

PERPENDICULAR DISTANCE FROM THE LINE OF ACTION OF THE FORCE TO THE FULCRUM

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4
Q

TORQUE

A

DEGREE TO WHICH A FORCE TENDS TO ROTATE AN OBJECT ABOUT A SPECIFIED FULCRUM

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5
Q

MUSCLE FORCE

A

FORCE GENERATED BY BIOCHEMICAL ACTIVITY OR THE STRETCHING OF NON CONTRACTILE TISSUE THAT TENDS TO DRAW OPPOSITE ENDS OF MUSCLE TOWARD EACH OTHER

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6
Q

RESISTIVE FORCE

A

FORCE GENERATED BY A SOURCE EXTERNAL TO THE BODY THAT ACTS CONTRARY TO MUSCLE FORCE

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7
Q

FIRST CLASS LEVER

A

MUSCLE FORCE AND RESISTIVE FORCE ACT ON OPPOSITE SIDES OF THE FULCRUM

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8
Q

SECOND CLASS LEVER

A

MUSCLE FORCE AND RESISTIVE FORCE WORK ON SAME SIDE OF FULCURM, MUSLCE FORCE ACTS THROUGH A LONGER MOMENT ARM THAT THE RESISTANCE FORCE.
EX. GASTROC IN CALF RAISE

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9
Q

THIRD CLASS LEVER

A

MUSCLE FORCE AND RESISTIVE FORCE WORK ON SAME SIDE OF FULCRUM, MUSCLE FORCE MOMENT ARM IS SHORTER THAN RESISTIVE FORCE MOMENT ARM
EX. BICEP CURL

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10
Q

SAGITAL PLANE

A

SLICE BODY LEFT & RIGHT PORTIONS

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11
Q

FRONTAL PLANE

A

SLICE BODY FRONT & BACK PORTIONS

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12
Q

TRANSVERSE PLANE

A

SLICE BODY INTO TOP & BOTTOM PORTIONS

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13
Q

HOW DOES NEURAL CONTROL IMPACT MAXIMAL FORCE OUTPUT OF A MUSCLE

A

BY DETERMINING WHICH AND HOW MANY MOTOR UNITS ARE RECRUITED

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14
Q

WHAT 3 FACTORS ALLOW FOR GREATER MUSCLE FORCE

A
  • MORE MOTOR UNITS INVOLVED IN THE CONTRACTION
  • LARGER MOTOR UNITS
  • FASTER RATE OF FIRING
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15
Q

PENNATE MUSCLE DEFINITION

A

HAS FIBERS THAT ALIGN OBLIQUELY WITH THE TENDON

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16
Q

MUSCLES WITH GREATER PENNATION ARE BETTER ABLE TO

A

GENERATE FORCE

17
Q

WHEN IS PENNATION DISADVANTAGEOUS

A

GENERATING ECCENTRIC, ISOMETRIC, OR LOW SPEED CONCENTRIC FORCE

18
Q

A HIGHER ACCELERATION EXERCISE PROVIDES GREATER RESISTANCE TO

A

MUSCLES INVOLVED EARLY IN THE ROM

19
Q

AN EXERCISE INVOLVING HIGHER ACCELERATION PROVIDES LESS RESISTANCE TO

A

MUSCLES INVOLVED LATE IN THE ROM

20
Q

EXAMPLES OF EXERCISES THAT ARE EFFECTIVE FOR IMPROVING ABILITY TO PRODUCE HIGH ACCELERATIONS AGAINST HEAVY RESISTANCE

A

OLYMPIC LIFTS, SUCH AS CLEAN AND JERK OR SNATCH

21
Q

BRACKETING TECHNIQUE

A

ATHLETE PERFORMS SPORT MOVEMENT WITH LESS THAN NORMAL AND GREATER THAN NORMAL RESISTANCE

22
Q

SURFACE DRAG

A

TYPE OF FLUID RESISTANCE RESULTING FROM THE FRICTION OF A FLUID PASSING ALONG THE SURFACE OF AN OBJECT

23
Q

FORM DRAG

A

TYPE OF FLUID RESISTANCE THAT RESULTS FROM THE WAY IN WHICH A FLUID PRESSES AGAINST THE FRONT OR REAR OF AN OBJECT PASSING THROUGH IT