how do muscles create?
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Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and motion.
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Mᴜsᴄʟᴇs are composed of muscle fibres which are themselves composed of myofibrils, which are the contractile units of your muscles. During a workout, these fibres activate: the muscle shortens, creating a muscle contraction, causing the ends to draw closer together, and thus causing movement.
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