ISSA Section 3: Health and Physical Fitness Flashcards
two-joint-muscles:
Muscles that cross two joints rather than just one, such as the hamstrings, which cross both the hip and the knee.
prime mover (agonist):
Denoting a muscle in a state of contraction, with reference to its opposing muscle, or antagonist.
assistant mover:
The muscle that plays a secondary role in the prime mover involved.
co-contraction:
When both the agonist and antagonist undergo contraction.
stabilizer:
Muscle that steadiesor holds a body part in place
true synergy:
When a muscle contracts to stop the secondary action of another muscle.
neutralizer:
When a muscle contracts to counteract an undesirable action of another muscle.
frontal (coronal) plane:
Separates the body into anterior (front) and posterior (back) parts.
transverse (horizontal)plane:
Separates the body into superior (top) and inferior (bottom) sections.
dorsiflexion:
Turning upward of the foot or toes or of the hand or fingers.
plantarflexion:
Extension of the ankle, the pointing of the foot and toes.
hyperextension:
Extension of a limb or part beyond the normal limit.
abduction:
Movement of a body part away from the midline.
adduction:
Movement of a body part toward the midline.
rotation:
The circular movement of a body segment about a long axis.
supination:
Assuming a horizontal position facing upward. ln the case of the hand, it also means turning the palm to face forward. The opposite of pronation.
eversion:
Turning outward, as of the sole of the foot.
circumduction:
Movement of a part. e.g., an extremity, in a circular direction.
force:
The interaction that creates work, action, or physical change.
direction:
The way in which the force is applied.
point of application:
Where the force is applied to the body or implements being used.
the angle of pull:
The angle at which a muscle pulls relative to the long axis of the bone on which it pulls.
power:
The work done in a unit of time.
lnertia:
The tendency for an object to remain in its current state (in motion or at rest).