E3: Stability and Instability

Question 1

Does stability = balance

Answer 1

yes

Question 2

stability is the ability to ___ the ___ that make an athlete stable

Answer 2

control, forces

Question 3

stability can be __ or a __ motion

Answer 3

static, dynamic

Question 4

___ stability is concerned with an athlete who is moving in a particular direction

Answer 4

linear

Question 5

a heavyweight rowing has __ linear stability.

surfers, figure skaters must contend with sudden __ changes.

Answer 5

high, sudden

Question 6

__ stability is concerned with an athlete who is rotating

Answer 6

rotary

Question 7

rotary stability is the resistance of being tilted, tipped over, upended, or spun around in a ___

Answer 7

circle

Question 8

excellent rotary stability makes athletes more able to ___ the destabilizing and turning effect of an applied ___

Answer 8

resist, torque

Question 9

6 factors that increase stability

Answer 9

size of the base of support
central line of grvaity within base
lower CoG
increase body mass
extend base in direction of oncoming force
shift line of gravity toward oncoming force

Question 10

With the size of the base of support, the __ must remain within the base of support in order to maintain ____

Answer 10

CoG, equilibrium

Question 11

keeping the CoG within the base of support is easier with a __ base of support

Answer 11

larger

Question 12

as the CoG moves closer to the base of support, more angular __ can occur before is goes beyond the base of support

Answer 12

displacement

Question 13

more ___ = more stability

Answer 13

mass

Question 14

the heavier an athlete, the more ___ required to throw them off balance

Answer 14

force

Question 15

heavier athletes who get out of control and loose their balance must exert __ muscular force to regain their balance than lighter athletes.

Answer 15

more

Question 16

to initiate a step forward, (in walking or running), the __ of ___ must be shifted in ___ of the base of support. The swing leg then moves forward to __-___ a base of support.

Answer 16

line of gravity, front
re-establish

Question 17

mobility and stability have an ___ relationship

Answer 17

inverse

Question 18

In sport, it is necessary to alter stability intentionally to become __

Answer 18

mobile

Question 19

the ability to start, stop, or change direction quickly depends on manipulating the ___ of the body

Answer 19

stability

Question 20

To enhance the speed of a start, the line of gravity should be as close as possible to the ___ of the base of support

Answer 20

edge

Question 21

To enhance the speed of a start, the line of gravity should be as close as possible to the edge of the __ of ___

Answer 21

base of support

Question 22

a quick stop requires a ___ base of support, __ CoG, and movement of the line of gravity __ from the leading edge of the base of support

Answer 22

large, lower, away

Question 23

what is stability?
what is linear stability?
what is rotary stability?

Answer 23

stability: ability to control the forces that make an athlete stable.
Linear stability: movement in one direction
Rotary stability: rotational movement

Question 24

what factors impact stability?

Answer 24

size of base of support
central line of gravity within base of support
lowered CoG
increased body mass
extended base in direction of oncoming force
shift line of gravity towards oncoming force

Question 25

what kind of relationship do stability and mobility have?

Answer 25

inverse