Antagonist the muscle that counteracts the agonist

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Antagonist - the muscle that counteracts the agonist, lengthening when the agonist muscle contracts. How muscles work together to create force and prevent injury *** Newton’s 3rd Law *** - equal and opposite
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Origin and Insertion Origin - point where muscle attaches to bone the axial skeleton Insertion - the point where the muscle attaches to the bone that is moved most. Eg - biceps brachii originates from the coracoid process and inserts on the radial tuberosity of the radius
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Type of Muscle Contraction Concentric - Shortening of muscle fibres Eccentric - Lengthening of muscle fibres Isometric - controlled shortening (concentric contraction) and lengthening of muscle Isotonic - muscle fibres maintain a constant length throughout the contraction Isokinetic - use of machines to control the speed of the contraction within the range of motion. (both isometric and isotonic
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Muscle Fibre Respond to Training When a muscle is exercised, its fibres respond in two basic ways: 1. Transient Hypertrophy 2. Chronic Hypertrophy
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Muscle Fibre: Response to Training Transient Hypertrophy (the pump): Increased fluid accumulation (edema) to the specific muscle or muscles exercised. A sudden rush of blood to the muscle. Quickly achieved but transient hypertrophy will disappear shortly after stopping the exercise.
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Muscle Fibre: Response to Training Chronic Hypertrophy: This is what most people want…. Increased capillary density Increased muscle proteins, actin and myosin Increased storage capacity of glucose, glycogen, ATP and creatine phosphate
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Muscle Atrophy Muscle Atrophy – when a muscle is not exercised, and results in shrinking of muscle size and strength. Muscle atrophy can also occur following malnutrition, disease, or after a long term resistance program has been abandoned.
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Muscle Hyperplasia Muscle Hyperplasia – Theory! Hyperplasia means fibre-splitting. It is hypothesized that once a fibre has reached its maximal hypertrophy, any further size and strength gains will come only through the formation of two “daughter cells.” It has only been proven to occur in certain animals!!!
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STUDYING GROUPS Station # 1:MUSCLES SUIT # 1 - UPPER Station # 2:MUSCLES SUIT # 2 - LOWER Station # 3:MR. BONES - Origin/Insertion Station #4:Questions and Multiple Choice Station #5:Biodigital and Muscles Slideshow
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  • Spring '14
  • muscle atrophy

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