Athletics of To-Day 1929

Athletics of To-day His rate of speed at various points was as follows: At yds. from Yds. per Miles per start second hour 30 1o.go 22.3 so 1I.14 22.8 70 11.46 23.5 go 11.37 23.3 110 11.04 22.6 130 10.78 22.0 150 1o.so 2I.5 170 10.16 20.8 1go g.8s 20.1 As the result of his experiments Professor Hill arrived at the conclusion that a first class sprinter travelling at top speed uses up go% to gso/o of his effort in overcoming the frictional resi tance of his own mu cles. The force he ex rts is equal to 8o%> or go 0 / 0 of the weight of his body, and the amount of work he does in running 100 yards would be sufficient to raise his body 240 to 270 fe t into the air. Approximately one second is lost in the tarting process, approximat ly eight horse-power is developed and the maximum sp d attained sixty or seventy yards from the start, when the man may be travelling as fast as twenty-four mil s an hour. From the point at which the great t v locity is r ached the runner begins to lose sp cd through fatigue due to the rapid appearance of lactic acid in the muscles, as much as an eighth of an ounce of such acid being secreted in the mu cl sub tance very second. On these lines it woul appear that a sprint effort sustain for 30 s cs. should produce almost complete xhaustion, and y t neith r B. J. Wefers, U. .A., wh n he mad th world's 300 yards r cord of 30 3 s cs. in r g6, nor G. ~f. utl r, reat ritain, who equall d it in 1g26, collapsed after passing the finishing post.