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Show Blood Changes After Exercise Corpuscles Increase Enormously, Especially After Exertion in Swimming'. Special to Tho Tribune. PHILADELPHIA, April 23.-Dr. Philip B. Hawk of the University of Pennsylvania Penn-sylvania has been making Investigations Investiga-tions In blood analysis to determine what branch of athletics is best for health. Ills examinations have 'been made after various forms of exorcises, and reveal that tho number of corpuscles lncreaso immediately immedi-ately after exertion. "The enormous lncreaso In tho Tlood count following vigorous athletic exercise," exer-cise," says Dr. Hawk, "probably la duo to the sudden passage into the circulation of a large number of cells lying inactlvo In various parts of the body before the cxer-clo cxer-clo took place." Tho Influence of swimming on the corpuscles cor-puscles Is moBt marked, tho greatest Increase In-crease being In a thrce-mlnuto game of water polo. In this case the average Increase In-crease was 1W.-I per cent, proving swimming swim-ming to bo tho most vigorous of the sports considered. Dr. Hawk's Investigations havo brought to light a fact of al-nost equal interest. The blood average of a college athlete Is found to contain IJ.GXJ.OCO red corpuscles per cubic millimetre, whilo that of the avorago male, according to physiological text-books, Is only between -1,500,000 and 5,(100,000. Tho percentage of Increase In the most interesting of these experiments follows: 100-yard dash, 24.S; 120-yard hurdles, 21.3; half-mile run, 17.9: mile run. 13.9; two-mile run, 8.8; broad Jump (six Jump3), 15.0. |