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4.2.2 Types of muscle contraction
IB SEHS Topic 4 Movement Analysis
Terms in this set (8)
Outline the types of muscle contraction
Isotonic, isometric, isokinetic, concentric, eccentric
an increase in tension (load) results in changes in skeletal muscle length. i.e. lengthening and shortening of the muscle.
Concerns muscle actions that produce a force to overcome the load being acted upon. The work done is referred to as positive work.
Refers to muscle action in which the muscle force yields to the imposed load. The work done during a concentric contraction is referred to as negative
In general in this form of contraction the muscle length remains constant. It occurs when muscle force balances resistance and no joint movement occurs
The term is used in two contexts. First, as a specific muscle contraction and second as a testing and rehabilitation machine
Explain the concept of reciprocal inhibition
When an agonist contract to move a body segment, it is usual for the antagonist (the muscle with the opposite concentric contraction action) to relax. This means that the agonist is not being opposed by any muscle torque acting in the opposite direction of the motion. This is an automatic action controlled by neurons. When the agonist motoneuron is stimulated the motoneuron to the antagonist is inhibited preventing it from contacting strongly
Discuss delayed onset of muscle soreness in relation to eccentric and concentric muscle contractions
The pain and stiffness felt in muscles several hours to days after unaccustomed or strenuous exercise.
*brought on by eccentric contractions of the muscle causing pressure at the nerve endings.
THIS SET IS OFTEN IN FOLDERS WITH...
Topic 6.3 - Components of Fitness
4.3 Fundamentals of Biomechanics
OT core values
Skeletal Muscle Contraction
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