PE 202 - Chap. 3 Fundamentals of Applied Kinesiology
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is a muscle that causes a desired motion. (prime mover)
muscles that have the potential to oppose the action of the agonist muscle.
assist the agonist in causing a desired action.
Agonist and antagonist muscles contract together and a joint must be stabilized.
Muscle resists force and lengthens as it creates tension.
Motion is controlled (slowed) by the muscle contraction.
Center of gravity (COG)
Line of Gravity
Gravity acts on the body in a straight line through its COG toward the center of the earth.
Base of support (BOS).
- is the area beneath the body that is encompassed when one continuous line connects all points of
- the body that are in contact with the ground.
Law of inertia
- A body at rest will stay at rest and a body in motion will stay in motion
- (with the same direction and velocity)
- unless acted upon by an external force
Law of acceleration
Force (F) acting on a body in a givendirection is equal to the body’s mass (m) multiplied by its acceleration (a).
Law of reaction
Every applied force is accompanied by an equal and opposite reaction.
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