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1-29-08 Flexibility and Body Composition

1-29-08 Flexibility and Body Composition - Flexibility and...

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1-29-08 Flexibility and Body Composition Leanest State—Colorado Fattest State—Mississippi Where does NC rank in terms of the fattest states in the US?—17 th What percentage of adults in NC are obese or overweight?—62.6% What percentage of children in NC get the minimum amount of physical activity?—54% 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 Really be Worried about my Flexibility? Increased flexibility may assist with balance, performance, and reaction time There is debate over whether stretching helps to prevent injury o Many believe it is critical with regard to injury prevention o Should be performed after warm-up What structures in the body can limit flexibility? Bone Fat Skin Scar Tissue Muscles and tendons Ligaments Active and Passive Range of Motion Active range of motion (AROM) o Motion of a joint generated by a muscle contraction o Not always an indicator of joint stiffness or looseness Passive range of motion (PROM)
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o Portion of total range of motion through which a joint can be moved passively, without active muscle contraction o Movement beyond AROM Agonist vs. Antagonist Muscles Agonist muscle o The muscle that contracts and generates the desired joint motion i.e. quadriceps when generating knee extension Antagonist muscle o Muscle that stretches in response to agonist muscle contraction i.e. hamstrings stretch as quadriceps contract to extend knee
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