Contraction Velocity

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4 Terms

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Contraction velocity

Relationship varies depending on contraction type, muscle fibres contract at specific speed to develop force and move a segment/load

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Low load vs high load

Increased speed of shortening for low load, decreased speed of shortening for high load

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Concentric contraction

Inverse relationship between velocity and force production - as velocity increases, force decreases due to increased cycle rate of actin-myosin links there are more unattached links at one time = less force

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Eccentric contraction

Increased velocity causes increased force due to passive components - lengthening and resistance by passive elastic components, some crossbridges remain attached due to stretch - can produce more force than concentric contraction