CH4 Flashcards
BIOMECHANICS OF RESISTANCE EXERCISE (23 cards)
LEVER
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
FULCRUM
PIVOT POINT OF LEVER
MOMENT ARM
PERPENDICULAR DISTANCE FROM THE LINE OF ACTION OF THE FORCE TO THE FULCRUM
TORQUE
DEGREE TO WHICH A FORCE TENDS TO ROTATE AN OBJECT ABOUT A SPECIFIED FULCRUM
MUSCLE FORCE
FORCE GENERATED BY BIOCHEMICAL ACTIVITY OR THE STRETCHING OF NON CONTRACTILE TISSUE THAT TENDS TO DRAW OPPOSITE ENDS OF MUSCLE TOWARD EACH OTHER
RESISTIVE FORCE
FORCE GENERATED BY A SOURCE EXTERNAL TO THE BODY THAT ACTS CONTRARY TO MUSCLE FORCE
FIRST CLASS LEVER
MUSCLE FORCE AND RESISTIVE FORCE ACT ON OPPOSITE SIDES OF THE FULCRUM
SECOND CLASS LEVER
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
THIRD CLASS LEVER
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
SAGITAL PLANE
SLICE BODY LEFT & RIGHT PORTIONS
FRONTAL PLANE
SLICE BODY FRONT & BACK PORTIONS
TRANSVERSE PLANE
SLICE BODY INTO TOP & BOTTOM PORTIONS
HOW DOES NEURAL CONTROL IMPACT MAXIMAL FORCE OUTPUT OF A MUSCLE
BY DETERMINING WHICH AND HOW MANY MOTOR UNITS ARE RECRUITED
WHAT 3 FACTORS ALLOW FOR GREATER MUSCLE FORCE
- MORE MOTOR UNITS INVOLVED IN THE CONTRACTION
- LARGER MOTOR UNITS
- FASTER RATE OF FIRING
PENNATE MUSCLE DEFINITION
HAS FIBERS THAT ALIGN OBLIQUELY WITH THE TENDON
MUSCLES WITH GREATER PENNATION ARE BETTER ABLE TO
GENERATE FORCE
WHEN IS PENNATION DISADVANTAGEOUS
GENERATING ECCENTRIC, ISOMETRIC, OR LOW SPEED CONCENTRIC FORCE
A HIGHER ACCELERATION EXERCISE PROVIDES GREATER RESISTANCE TO
MUSCLES INVOLVED EARLY IN THE ROM
AN EXERCISE INVOLVING HIGHER ACCELERATION PROVIDES LESS RESISTANCE TO
MUSCLES INVOLVED LATE IN THE ROM
EXAMPLES OF EXERCISES THAT ARE EFFECTIVE FOR IMPROVING ABILITY TO PRODUCE HIGH ACCELERATIONS AGAINST HEAVY RESISTANCE
OLYMPIC LIFTS, SUCH AS CLEAN AND JERK OR SNATCH
BRACKETING TECHNIQUE
ATHLETE PERFORMS SPORT MOVEMENT WITH LESS THAN NORMAL AND GREATER THAN NORMAL RESISTANCE
SURFACE DRAG
TYPE OF FLUID RESISTANCE RESULTING FROM THE FRICTION OF A FLUID PASSING ALONG THE SURFACE OF AN OBJECT
FORM DRAG
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
