Muscles Flashcards
what is isometric contraction
doesn’t change length when contracting
what is isotonic contraction
changes length whilst contracting
what is eccentric contraction
the muscle lengthens
what is concentric contraction
the muscle shortens
are energy systems used individually
no, a mix of all types are used for each activity
what is a twitch
a single response of a muscle fibre
what is the contraction time
time between beginning of tension and peak tension
what is tension
a force that a muscle exerts on the joint
what is load
the force that is exerted on a muscle
what must tension be for muscle fibres to shorten
tension must exceed the load
what must tension be for muscle fibres to lengthen
tension must not exceed the load
in a shortening contraction, inc load causes what
latent period to increase, velocity of shortening to slow down
how does angle of muscle effect twitch properties
closer to optimum length allows a larger tetanic contraction
3 types of muscle fibres
fast glycolytic, slow oxidative, fast oxidative glycolytic
mechanisms involved in muscle fatique
lactic acid build up, fuel substrates, conduction failure
