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Ch 1 exam finish
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The 3 different muscle type fibers
Type I
Type IIa
Type IIx
Type I Muscle fiber
Slow twitch / Slow oxidation (SO)
Type II Muscle fiber
Fast twitch / More develop SR, more CA2+
Type IIa muscle fiber
FOG
Fast oxidation glycolytic
Type IIx Muscle Fiber
FG
Fast Glycolytic
Difference between Type I and Type II
Type II muscle fibers motor units are larger than Type I
Type II muscle fibers motor units have more muscle fiber to contract than Type I
Type I & II
Muscles fiber Type I & II are similar in both arms and legs
How does Skeletal Muscle fiber type affect activity performance ?
Type I have high aerobic endurance for low intensity
Type II Anaerobic activity
Type IIa High intensity exercise
Type IIx force demand of muscle
How to determine the fiber type make ups
Endurance training
Strength training
Muscular inactivity
Aging may shift fiber distribution
What determines the fiber type make up of an individual?
The type of event and sports
genetics
Does skeletal fiber type vary from person to person and from muscle to muscle?
Yes, muscles are different from person to person
Which fiber type display greater power ?
Type IIx
Muscular Power & Formula
Capacity of muscles to generate force during a fast contraction
Force x Distance/Time
Muscular Force
Generated force during contraction
Muscular Power
Generate force during a fast contraction
Muscular Endurance
Sustained repeated contraction or a single contraction
The 3 types of muscle action
Concentric
Isometric
Eccentric
Concentric
Force develop while muscle is shorting
Isometric
Force generate but the length of the muscle is unchanged
Eccentric
force generated while muscles lengthen
The factors of Force generation
# of motor units activated
Nature of Neutral Simulation
Muscle size
Muscles length
Joint angle
Speed of muscle action
Type of muscle action
How the Nervous system causes gradation in contractions?
Recruitment
Rate Coding
Recruitment
Varying the # of motor units activated
Rate Coding
Increasing or decreasing of firing motor units
Motor unit Recriutment
Motor units are activated basis on of a fixed order
Nature of Nueral Stimulation
Rate Codeing
Length of Muscle
Muscle strecthed to far Little overlaping
Author
rsanchez15
ID
90349
Card Set
Ch 1 exam finish
Description
study ?
Updated
2011-06-13T17:47:26Z
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