Ther Ex for Rehab

Question 1

Rehab…

Answer 1

prevents atrophy

restores strength, endurance, power

Question 2

One muscle fiber is made up of many ______

Answer 2

myofibrils

Question 3

One myofibril is made of ______ which lie in series with ________

Answer 3

sarcomeres; myofibrils

Question 4

Myosin fibers are…

Answer 4

thicker

Question 5

During contraction…

Answer 5

actin and myosin slide over one another

Question 6

Z line

Answer 6

end of actin filaments

Question 7

I band

Answer 7

action only that straddles the Z line

Question 8

A band

Answer 8

runs length of myosin filament

Question 9

H zone

Answer 9

only myosin filament w/ no overlap of actin

Question 10

M line

Answer 10

very center of myosin in the H band

Question 11

Sliding Filament Theory

Answer 11

myosin cross bridges flex- pull actin filaments toward the center of sarcomere
H zone becomes smaller and Z lines move toward center
Sarcomere length changes b/c actin and myosin fils slide over each other

Question 12

Regulation of muscle contraction

Answer 12

the nervous system exerts control over motor activity by way of the motor unit

Question 13

Ration of muscle fibers to motor units

Answer 13

the bigger the muscle the more units you have

Question 14

Cross sectional area

Answer 14

muscles that are larger in cross-sectional area have larger numbers of sarcomeres in series

Question 15

Angle of pennation

Answer 15

muscles with more pennation have greater cross sectional areas

Question 16

strength

Answer 16

the maximal force that a muscle can develop in a single contraction

Question 17

Functional strength is…

Answer 17

the ability of the neuromuscular system to produce, relax, and control forces during functional activities, in a smooth, coordinated manner

Question 18

Power

Answer 18

Force x Distance/ Time

Question 19

Endurance

Answer 19

the ability to perform low intensity, repetitive or sustain activites over a prolonged time

Question 20

Isometric contractions

Answer 20

muscle contracting but holding at an angle

Question 21

Isotonic contractions

Answer 21

Concentric

Eccentric

Question 22

Length tension relationship

Answer 22

a muscles ability to generate tension depends on the position

• Peak force production is at or near mid range
• 90 degrees should be strongest; sometimes 45 is

Question 23

Active insuffiencency

Answer 23

muscle is too short to generate tension

Question 24

Passive insuffiencency

Answer 24

muscle is too long to generate force

Question 25

Static exercises

Answer 25

increase tension with no change in muscle length

Question 26

Open chain

Answer 26

distal segment not fixed
good for testing MMT
*Easier on the joints

Question 27

Closed chain

Answer 27

distal segment is fixed

good for LE function-stance phase

Question 28

DOMS

Answer 28

occurs 24-72 hours post exercise

Question 29

SAID Principle

Answer 29

specific adaptation to imposed demands

*muscle adapts over time to the stresses placed on them

Question 30

Overload principle

Answer 30

muscle must be challenged to perform at a level greater than what it is accustomed progressive increase in load

Question 31

Reversibility Principle

Answer 31

functional gains are not maintained unless exercise consistently performed

Question 32

Endurance rest interval

Answer 32

< 30 seconds

Question 33

Hypertrophy rest interval

Answer 33

30-90 seconds

Question 34

Strength rest interval

Answer 34

2+ minutes

Question 35

Power rest interval

Answer 35

2-5 minutes