Show book on sports reveals few causes of fatigue the who ling lias wondered onder nl about the tired feeling that follows unusual exertion Is given eh en the inside dope by professor elwyn of columbia sity in ills his new book yourself inc the runner or swimmer isn t simply simple tired lie has been poisoned and tile villain in the case Is himself research Ilc search lias has shown that exercise develops in the muscles inu seles a polson poison called lactic acid which must be slowly burned up lly bv oxygen oisen to effort effect reco eri cry in 06 few seconds of a ynid yard basli more than an ounce of auld acid Is formed requiring over till an hour before the just drop 19 burned away awai tho alip heat generated geneia ted in nn an ketive persons muscles Illus Ies consumes the oxygen n and re leases the carbon dl olde experiments have irown chown that a swimmer skimmer exhales eliades eli ales 12 times as macli carbon dioxide its as an all idle person does A marching man mail with etli a heay pact develops de clent heat every eoy tle five mint minutes ites to io tile beat of its his body one degree fahrenheit at the end of 10 hours however lioe pr lie be does not reach boiling point thanks to ills wonderful automatic cool cooling ilig |