Hey Dave.
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Dave de Vos wrote:
I think they are different. For one thing, it seems internal strength does not fade as one grows older, while athletic strength does.
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That does seem to be the way it seems/appears, but then again I don't see any internal masters of age winning any kind of athletic competitions against young men. So it might be a theory but I don't think there is any conclusive prof of this being the case.
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You want the ground because without the friction ground, you can be slid away easily. There is not much of a danger of buckling or toppling, because there are no stresses on the body.
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Isn't what you are doing to not "slide away" an alignment? If there are no stresses on the body, where is the force from something pushing on the body going? Shouldn't there be a stress at least at the point of impact? Where is the incoming force going?