Presentation on theme: "Muscle Contraction and Exercise. Differentiate Between Contractions Twitch; single contraction of muscle fibers/single threshold stimulus/lab induced."— Presentation transcript:
Differentiate Between Contractions Twitch; single contraction of muscle fibers/single threshold stimulus/lab induced Tetanic; caused by a series of stimuli in rapid succession/sustained and steady
Isotonic; produces movement at joint/ muscle changes length/ I to O Walking/ running..lifting a book Isometric; no movement, muscle as a whole does not shorten/ tension within the muscle increases…holding a book in mid air
Exercise Improves muscle tone (muscle firmness/posture) More efficient C/V system (heart muscle) More efficient lung functioning Decreased fatigue
Training Strength vs. Endurance Strength: contraction of muscles against heavy resistance Increases # of myofilamants in each muscle fiber(not the # of muscle fibers) Total mass of muscle increases
Endurance; (aerobic training) Increases a muscle’s ability to sustain exercise Does not usually result in hypertrophy Increases efficiency of oxygen and nutrient delivery
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