Kin 202 Muscle Fibers Exam 4
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11 Terms
Structural Characteristics of Slow Twitch
Slow, low force, fatigue resistant
Structural Characteristics of Fast Twitch A
Fast, high force, most fatigue
Structural Characteristics of Fast Twitch B
Fast, high force, high fatigue
Metabolic Characteristics of Slow Twitch
Low PCr and glycogen stores, high fat stores, low anaerobic enzymes, and high aerobic enzymes
Metabolic Characteristics of Fast Twitch A
High PCr and glycogen stores, medium fat stores, high anaerobic enzymes, and low aerobic enzymes
Metabolic Characteristics of Fast Twitch B
High PCr and glycogen stores, low fat stores, high anaerobic enzymes, and low aerobic enzymes
Motor Neuron Characteristics of Slow Twitch
A2 neuron types, low conduction velocity, low recruitment threshold
Motor Neuron Characteristics of Fast Twitch
A1 neuron types, high conduction velocity, and high recruitment threshold
High intensity exercise
Recruit more fast twitch muscle fibers with a high recruitment threshold (Strength training athletes)
Low intensity exercise
Recruit more slow twitch muscle fibers with a low recruitment threshold (Endurance athletes)
Size principal of Fiber Recruitment
Muscle fibers are recruited from smallest to largest
Type 1/small motor units recruited first
Note 
Flashcards (21)