LFIT4 - Flexibility and Body Composition What is...

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Flexibility and Body Composition What is flexibility Defined as the range of motion possible about a given joint or series of joints Specific to a given joint or movement When limited, extremity motion may be negatively impacted Should I be worried about flexibility? Increased flexibility may assist with balance, performance, and reaction time Debate over whether stretching helps to prevent injury, performed after warm-up Structures limiting flexibility: Bone Fat Skin Scar tissue Muscles and tissues Ligaments Two ranges of motion: Active range of motion (arom): o Motion of a joint generated by a muscle contraction o Not always an indicator or joint stiffness or looseness Passive range of motion (prom): o Portion of total range of motion through which a joint may be moved passively, without active muscle contraction o Movement beyond arom.
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Agonist muscle: The muscle that contracts and generates the desired joint motion Ex. Quads when generating knee extension Antagonist muscle: Muscle that stretches in response to agonist muscle contraction Ex. Hamstrings stretch as quads contract to extend knee Coordination between agonists and antagonists in critical for coordinated, smooth joint motion.
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