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1
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when a muscle is no longer able to sustain a contraction
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4
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a waste product that builds up in muscles (2 words)
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6
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maintaining body posture is one job of ........ muscle
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7
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one of the two types of filaments
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8
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the heart is a .............. muscle
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10
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these make up one muscle fibre
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2
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attaches bone to muscle
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3
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when a muscle returns to it's normal length
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5
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the only type of stretching that should be included in a warm-up
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9
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an increase in heart rate ensures that this is carried to the muscles
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11
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muscles are made up of.........
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12
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the colour of slow twitch fibres
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