lecture 14: hockey

Question 1

radius of contour is aka what (informal)

Answer 1

rocker

Question 2

what happens if you have an increased radius of contour

Answer 2

increase blade to ice contact which may increase skating speed

Question 3

what happens if you have a decreased radius of contour

Answer 3

decreased blade to increase contact which may increase agaility

Question 4

increase blade to ice contact which may increase skating speed or agility

Answer 4

skating speed

Question 5

decrease blade to ice contact which may increase skating speed or agility

Answer 5

agility

Question 6

what happens if you have a decreased radius of hollow

Answer 6

increased grip of blade on ice which can decrease speed

Question 7

a decreased radius of hollow can be both beneficial and not, explain

Answer 7

it can increases stopping and turning but decrease speed

Question 8

what happens if you have a increase radius of hollow,

Answer 8

it will feel less sharp

Question 9

an increased radius of hollow feels more or less sharp

Answer 9

less sharp

Question 10

what are the 4 skating skills

Answer 10

linear
angular
starts
stop

Question 11

what are the two many phases of stride

Answer 11

support and swing

Question 12

what are the sub phases of support phase

Answer 12

glide and push off

Question 13

what is the sub phase of recorvery

Answer 13

swing

Question 14

when does the blade come off the ice

Answer 14

after push off and end of supprt

Question 15

support phase of skating takes what percentage

Answer 15

60

Question 16

glide takes up what percentage of support phase

Answer 16

40

Question 17

what is the movement of hip joints during skating

Answer 17

ice contact: hip flexion
at the end of support/by push off: full hip extension and external rotation
swing: hip is in flexion and internal rotation to bring leg in front of body for another stride

Question 18

what is movement of knee joint during skating

Answer 18

same as hip

Question 19

what is movement of ankle joint during staking

Answer 19

ice contact: dorsi and pronated
mid support: neutral pronation
push off: plantar and pronation (to push off)
swing: dorsi and supinated (to clear ice)

Question 20

what are the key differenced between real ice and skating treadmill

Answer 20

real ice has lower friction coefficient than treadmill
similar gross movement patterns
stride rate, vo2 and heart rate are higher on treadmill

Question 21

what are key differences between real ice and synthetic

Answer 21

synthetic:more knee extension
real :lower coefficient of friction
both: same general patterns

Question 22

what are the sex differences in skating

Answer 22

males: more flexion and abduction
females: more extension
both: no significant differences in vertical and side to side displacements, or skating step width

Question 23

what are the two techniques for backwards skating

Answer 23

crossover
c cut technique

Question 24

explain crossover

Answer 24

requires considerable lateral deviation

Question 25

explain c cut technqieu

Answer 25

involves continuous double support and alternating thrust and glide phase

Question 26

explain how forward skating velocity is greater than backwards

Answer 26

at propulsion, forward skating results in significantly greater extension moment and hip, knee and ankle (weight accetance is similar)

Question 27

what are the 3 skating starts

Answer 27

crossover starts forward skating starts thurst/glide t starts

Question 28

what is the difference between forward skating start and just stead skating

Answer 28

more muscle activation during acceleration vs just steady skate (males generate more, women do more knee extension)

Question 29

what is the main difference between novice and pro for forward skating starts

Answer 29

high caliber have a shorter skate contact time which can make them faster

Question 30

explain angular skating

Answer 30

significant lean centre of mass is outside base of support

Question 31

what is the difference between pro and novice in angular skating

Answer 31

novice used more plantar surface versus medial and lateral for pro

Question 32

explain difference between novice and pro in skating stops

Answer 32

HC completed stop phases slower and more stable (less forward lean)