Analysingmovement through the use of technology

Question 1

define limb kinematics

Answer 1

the study of efficiency of the movements of limbs

Question 2

describe limb kinematics

Answer 2

• reflective markers are placed on the performers bony landmarks and they are filmed suing multiple video cameras
• 3D analysis
• video motion

Question 3

decsribe the advanatges of limb kinematics

Answer 3

• data immediately available and accurate
• coaches can use the analysis to make chnages to technique
• can examine causes of injury which can be prevented as poor technique can be identified
• investigates the impact of equipment on technique so helps with selection of appropriate equipment e.g. weight of hockey stick

Question 4

decsribe the disadvantages of limb kinematics as a method of analysing movement

Answer 4

• equipment is expensive
• lab conditions make some techniques difficult to perform due to lack of space or lack of similarity to real life
• results do not take into account individual differences e.g. a technique may work for one individual but not for another

Question 5

describe force plates

Answer 5

• the platform measures the ground reaction forces that the performer generates.
• this can either be vertical or both planes of horizontal forces
• data is genarated including a force time graph

Question 6

describe the advantages of using force plates as a method of analysis movement

Answer 6

• fast and accurate results generated
• analysis of gait and take off/ landing techniqueand efficiency improvements for perfomrers
• results are useful to plan conditioning or developmental programmes

Question 7

describe the disadvantages of force plates as a method of analysing movement

Answer 7

• equipment is expensive
• lab conditions make some techniques difficult to perform e.g. high jumper may find difficult to replicate run up when asked to take off from platform

Question 8

define force plates

Answer 8

a platform measures all the ground reaction forces applied when a performer stands, steps across or jumps on it and gait and balance is measured

Question 9

define wind tunnel

Answer 9

a chambre through whihc air is forced

Question 10

describe wind tunnels in action

Answer 10

• an object or performer to be tested is placed in the tunnel
• a controlled flow of air is forced through and airflow around object is studied to measure resistance around it

Question 11

describe the advantages of using wind tunnels as a method of analysing movement

Answer 11

• equipment and technique can be adapted to increase aerodynamic properties, reduce the effect of air resistance and increase performance
• wind speed and direction are controllable to mimic competitive conditions
• individual pieces of equipment can be tested e.g. bike helmets

Question 12

describe the disadvantages of wind tunnels as a method of analysis movement

Answer 12

• equipment is expensive and usuall located in engineering facilities/ research labs
• real life conditions may impact unexpectedly so results may not always be realistic