lecture 13 - muscle performance Flashcards

1
Q

What type of fibre are type 1 muscle fibres?

A

Slow oxidative fibres

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2
Q

What are the features of type 1 muscle fibres?

A

Many mitochondria, lots of oxidative enzymes, rich blood supply

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3
Q

What type of fibres are type IIB muscle fibres?

A

Glycolytic fibres

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4
Q

What type of fibres are type IIA muscle fibres?

A

Intermediate fibres

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5
Q

What is the velocity-load relationship?

A

It is slower to shorten a bigger load

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6
Q

What are the effects of strength training on muscle fibres?

A

Increased actin and myosin, hypertrophy (increases fibre diameter)

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7
Q

What are the effects of endurance training on muscle fibres?

A

Increased oxidative capacity:
Increased mitochondria, increased capillary supply, increased lipid storage

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8
Q

What is a motor unit?

A

A single motor neurone and all of the muscle fibres that neurone innervates

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9
Q

What are the 2 mechanisms for regulating motor units?

A

Modulating the rate/frequency of APs fired, regulating the number of motor units activated

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10
Q

What is muscle tetanus?

A

Maximum obtainable force at a high stimulus frequency

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