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Lecture 21 : Agility and Change of Direction Flashcards

(44 cards)

1
Q

change of direction is a what skill

A

closed skill

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2
Q

agility is a what skill

A

open skill

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3
Q

change of direction is what

A

closed skills that involves a rapid whole body movement with a pre planned change of velocity or direction

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4
Q

what is agility

A

a rapid whole body movement with change of velocity or change of direction in response to a stimulus

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5
Q

agility requires and element of

A

decision making and reaction

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6
Q

agility is vital in what sports

A

territorial sports

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7
Q

what are the biomechanical factors of change of direction and agility

A

ground contact time

breaking and propulsive forces

deceleration mechanics

joint angles and trunk position

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8
Q

what are the neuromuscular factors of change of direction and agility

A

eccentric strength

rate of force development

reactive strength

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9
Q

what are the anthropometric factors of change of direction and agility

A

body mass and limb length (limb length due to turning radius)

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10
Q

when you are performing something and trying to be agile you are most likely to be making what type of turns

A

quick turns rather than short turns

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11
Q

what are sharp turns

A

like 180 deg turns

have to stop all momentum in one direction and re-engage in a different direction

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12
Q

short turns require more what than quick turns

A

require a lot more eccentric and speed strength

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13
Q

what have a longer duration in the contact phase quick of sharp turns

A

sharp turns due to the change in momentum

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14
Q

what type of turns are more risky and why

A

sharp turns are more risky because of the eccentric load,

but in saying this quick turns can also be risky

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15
Q

what is a quick turn

A

often the athlete is not completely stopping, redirecting a little bit

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16
Q

who will have a faster change of direction a player who is very strong but with not much power or a player who is less strong but greater rate of force development

A

the player that is less strong but with greater rate of force development

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17
Q

what techniques are important in cutting

A

low centre of mass

wide base

optimal foot placement

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18
Q

what does trunk lean and shin angles tell us in terms of movement mechanics

A

how engaged those muscles are going to be and how effective the athlete is going to use those muscles

19
Q

what strength qualities are really important for change of direction and agility

A

eccentric strength

concentric and isometric strength

reactive strength

unilateral strength and control

20
Q

why is eccentric strength important for agility and change of direction

A

for braking / deceleration

21
Q

why is concentric and isometric strength important for agility and change of direction

A

for re-acceleration

22
Q

why is reactive strength important for agility and change of direction

A

for quick transitions

23
Q

explain perception action coupling (think 202)

A

our environment and actions guides our movement

perceptions shape action

actions shape perception

24
Q

what does perception shapes action mean and what is this called

A

we perceive information from our environment which informs our actions (affordance)

25
what does action shapes perceptions mean
our actions can influence what we perceive (dynamic adaptation)
26
what cognitive skills are important in agility
visual search strategies anticipation and decision making speed of decision making
27
a way to use perception action coupling to confuse a goalie
putting foot in other direction when kicking a goal as the goalie will be looking at their body position to inform their actions rather than the ball as there is not enough time for this
28
training methods linked to perception action coupling
small sided games constraints led approach (constraint manipulation and natural game scenarios) light / video reactive drills
29
most common injury from agility movements
ACL
30
mechanisms of injury risk in change of direction and agility
poor inter-muscular coordination underlying pathology poor mechanics : some athletes have a weak side cognitive fatigue :more difficulty making the decision and therefore more difficulty coordinating the muscles
31
what are key risk factors for injury in change of direction and agility
high breaking forces during deceleration and cutting poor trunk control and lateral trunk lean valgus knee collapse during plant phase fatigue affecting neuromscular control and technique asymmetries in strength or movement patterns
32
prevention strategy of injury from agility movements using eccentric strength training
focus on hamstrings, glutes and quads these are really important for posterior chain
33
prevention strategy of injury from agility movements using deceleration mechanics
coach proper foot placement, trunk position and low centre of mass
34
prevention strategy of injury from agility movements using neuromuscular control
integrate balance, proprioception and trunk / core stability drills
35
what is proprioception
vestibular, visual, kinaesthetic awareness, touch
36
how to train proprioception
take away one of the senses such as removing vision
37
when close to competition are we wanting to focus on bilateral or unilateral movements
unilateral and agility should be the focus more than bilateral closer to competition
38
how to train fatigue resistant movement quality
train technique under mild fatigue but avoid overload in compromised states
39
three categories of agility / COD tests and what are they
COD speed : COD that require either 1 or 2 high or low velocity entry changes of direction Manoeuvrability : CODs that require 3 or more changes of direction info processing : reactive tests require change of direction in response to stimulus
40
what is the issue with CODs tests
faster runners may perform better on these tests despite having a worse COD
41
what is the solution to the issue with COD tests
examine turn time seperate from sprint time
42
how is decision time tested with COD test
run through gates and change direction based on light run it based on planned compared to reaction time (last minute reaction to light) compare to find decision time
43
what order should agility training be done in
less complex to more complex
44
examples of change of direction tests
T-test illinois pro agility