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P.E. Foundations 1

Personal Fitness

Vocabulary wordDefinition
Relative muscular strength How much weight you can lift one time in relation to your body weight and gender.
Relative muscular endurance How many times you can lift a given weight in relation to your body weight and gender.
Progressive restistance The continued, systematic increase of muscle stress through the use of weights or other forms of resistance.
Weight training The use of such equipment as barbells, dumbbells, and machines to improve fitness, health, and appearance.
Cardiac muscle Muscle in the heart and arteries.
Smooth muscle Muscle located around internal organs that automatically controls many functions of the body.
Skeletal muscle Muscle located around bones and joints that controls movement.
Contract To shorten.
Muscle fibers (muscle cells) Long, thin structures the size of human hairs that contract to create movement. They run the entire length of a muscle.
Connective tissue The "glue" for the body tissue that binds muscles and bones together while still allowing them to move more efficiently.
Nerve In a muscle, the part that delivers the messages from the brain to direct each individual muscle fiber to contract.
Blood vessel In a muscle, the structure that provides oxygen, energy, and a waste removal system for each muscle fiber.
Concentric contraction The contraction and shortening of a muscle, which results in the movement of bones and joints; also called positive work.
Eccentric contraction A muscle's slow release of a contraction as it becomes longer; also called negative work.
Isotonic progressive resistance A combination of concentric and eccentric muscle contractions.
Isometric contraction A muscle's pushing against an immovable object and having no movement occur as it attempts to contract. The muscle does not become shorter or longer but creates tension.
Hypertrophy Muscle enlargement due to the thickening of each existing muscle fiber.
Atrophy A loss of muscle size and strength because of lack of use.
Hyperplasia A theory of muscle enlargement that says muscle growth is due to muscle fibers splitting and creating additional fibers.
Genetic potential Inherited muscle characteristics that determine the percentage, type, and number of our muscle fibers.
Microtear A small tear in a part of a muscle fiber or connective tissue because of greater-than-usual resistance; causes muscle soreness.
Created by: funkymonkey21