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1 Reddit comment about The Dictionary of Modern Medicine:

u/ZacharyMitchell · 2 pointsr/Aerials

From The Dictionary of Modern Medicine by J.C. Segen

  • Active Flexibility The ability to assume and maintain extended positions using only the tension of the agonist and synergist muscles whilst stretching the antagonist muscles
    Example Hoisting the leg and holding it without external support.

  • mobility [mo-bil´i-te]
    the ability to move in one's environment with ease and without restriction.

    But note this is talking about general mobility - In the context of physical fitness, physical mobility is a given...While there was no direct definition of physical mobility, there was a definition for the lack of which works just as well.

  • physical mobility, impaired
    A limitation in independent, purposeful physical movement of the body or of one or more extremities.

    So breaking this down - Mobility by itself is a more general term.

    When you read the first definition "he ability to assume and maintain extended positions using only the tension of the agonist and synergist muscles whilst stretching the antagonist muscles"

    it sounds more complicated and thus different - but what their detailing is called a cocontraction and it happens everytime you move purposely for the most part and thus applies to the definition of physical mobility as well. (note that a muscle can contract while stretched, and in order to maintain a flexy position like the splits, a cocontraction is pretty importiant to ensure stability in said flexy position, despite the stretchy tension on the antagonist)

    So basically, when you get past the fact that one definition is worded with more specificity, they really are the same thing.


    Physical Mobility - The ability to maintain and move your body through increased ranges of motion using only muscular contraction

    Active Flexibility - The ability to maintain and move your body through increased ranges of motion flexy positions using only muscular contraction.


    If there IS a difference, I think it is incredibly small and any sort of significant disagreement would be an exercise in ultimate pedanticism