OCR Text |
Show STRENGTH AT VARIOUS AGES. Muscles Have Their Stages of Development De-velopment and Decline. Careful Investigations have proved that tho muscles, as well as other oigans of the body, have tholr stages of development and decline Tests f tho sticngth of soveral thousands of people have been made by the uso of n dynnmonieti (strength measure), and the following are given ns tho average llguies of tho white raco. The lifting power of a youth of 17 la 2801b Iu his twentieth jear this In-ft In-ft eases to 3201b., and Iu his thirtieth nnd thirty-first jenrs It reaches Its height, 35fllb. At the end of tho thirty-first year tho strength begins to decline. Hy the fortieth year it has decreased 81b., and this diminution diminu-tion continues at a slightly Increasing rate until tho fiftieth jear Is reached, when the figure Ib 3301b. After this period the strength falls more and more rapidly. |