Chapter 4 - Biomechanics of Resistance Exercise Flashcards
anatomical/practical example of 1st class lever.
see-saw;the forearm during elbow extension against resistance (tri extensions)
anatomical/practical 2nd class lever
wheelbarrow- prac plantar flexion of the foot- ana
fulcrum/force theory for 1st class levers
force is opposite sides of fulcrum
fulcrum/force theory for 2nd class levers
force on same side of fulcrum, muscle force has bigger lever than the resistive force
fulcrum/force theory for 3rd class levers
force on same side of fulcrum, muscle force has a shorter lever than the resistive force
radiate muscle example
Gluteus Medius
longitudinal muscle example
rectus abdominus
fusiform muscle example
biceps brachii
multipennate muscle example
deltoid
bipennate muscle example
rectus femoris
unipennate muscle example
tibialis posterior
muscle generates the greatest force at its _________ length.
resting
body size classic formula
load lifted __________ body weight to the 2/3 power.
surface drag results from
the friction of a fluid passing along a surface
form drag results from
the way in which a fluid presses against the front or rear of an object passing through it.
lordotic back meaning
slightly arched
kyphotic back meaning
naturally s shaped slightly rounded back
muscles of the rotator cuff.
supraspinatus, infraspinatus, subscapularis, and teres minor
sagittal plane:
slices body into left and right planes
frontal plane:
slices body into front and back
transverse plane:
upper and lower body sections
which of the following best describes a knee joint?
synovial
cartilaginous
ball and socket
pivot
synovial
which of the following is the definition of power?
force x velocity
mass x acceleration
torque x time
force x distance
force x veloctiy
to compare performances of olympic weights lifters of different body weights, the classic formula divides the load lifted by the athletes:
body weight
body weight squared l
ean body weight body
weight to the two-thirds power
body weight to the two-thirds power
during a free weight exercise, muscle force varies with which of the following?
perp. distance from the weight to the body point
joint angle movement
acceleration movement
velocity squared
perp distance / movement acceleration
a vertical jump involved knee hip and should movement primarily in which plane?
sagittal
perpendicular
frontal
transverse
sagittal
An athlete is performing concentric isokenetic elbow flexion and extension. which of the following types of levers occur at the elbow during this exercise?
1st
2nd
3rd
1st and 3rd
________ joints operate as hinges and move in one place of motion.
uniaxial
The _____ and _______ are examples of biaxial joints.
ankle and wrist
3rd class lever anatomical and pracitcal example
the forearm; elbow flexion against resistance (biceps curl)
_________ ________ is the objects rotational speed, measured in radians per second.
angular velocity
rotational work = _____ * _______
torque * angular displacement
Muscle directly involved in movement, also known as prime mover is __________.
agonist
A muscle that can slow down or stop the action is known as ___________.
antagonist
muscle acting in assistance to stabilize the main muscles being used _________.
synergist
