Show STRENGTH AT VARIOUS AGES muscles have their stages of development and decline careful investigations have proved that the muscles as well as other organs of the body have their stages of development and decline tests of the strength of several thousands of people have been made by the us of a dynamometer strength measure and the following are given aa aber average figures of the white race the lifting power of a youth of 17 I 1 in his twentieth year this in creases to and in his thirtieth and thirty first years it reaches ita height at the end of the thirty first year the strength begins to decline by the fortieth year it has decreased and this dimina alon continues at a slightly increasing rate until the fiftieth year Is reached when the figure Is after thi period the strength falls more and more rapidly |