Abduction Moving a limb away from the midline of the body. Example
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Transcript Abduction Moving a limb away from the midline of the body. Example
DHQ
What does the word
aerobic mean?
*Hint-
it is a type of exercise
How do muscles work and
create movement?
Muscles turn energy into motion
Everything you do is expressed as muscular motion
The basic action of any muscle is contraction
A muscle is a bundle of cells called fibers
A muscle fiber contains myofibrils, which are cylinders
of muscle proteins
The proteins allow a muscle cell to contract
The contractions of all muscles are triggered by
electrical impulses
Continued……
Muscles have a mixture of two basic types of fibers;
1.
Fast twitch muscle fibers – capable of developing
greater forces, contract faster, and have greater
anaerobic capacity
1.
What are some anaerobic activities?
2. Slow twitch muscle fibers – develop force slowly,
maintain contractions longer, and have higher
aerobic capacity
What are some aerobic activities?
Flexion
Bending parts at a joint
Examples:
Bending at the knee and elbow,
bending head forward on the chest
Extension
Straightening parts at a joint
Examples:
Straightening the
leg, elbow, neck
Abduction
Moving a limb away from
the midline of the body.
Example:
Lifting the arm/leg horizontally away
from the body
Adduction
Moving a limb toward the
midline of the body.
Example:
Returning the arm/leg from the
horizontal position to the side of the
body.
Rotation
Moving a part around
an axis.
Example:
Twisting the head from side to
side and twisting the trunk from
side to side