i8o 



Scientific Proceedings (120). 



radial artery immediately before the exercise while the patient 

 was resting and three minutes after the exercise had ceased. In 

 one individual a third sample was taken eight minutes after the 

 work was stopped. 



In all cases there was a striking reduction in the bicarbonate 

 content of the blood, varying in the different individuals from 10.5 

 to 18.8 volumes per cent, of C0 2 . The C0 2 tension of the arterial 

 blood was always lower after exercise. The diminution varied 

 from 1.5 to 12.0 mm. The reaction of the blood was always less 

 alkaline, in one instance assuming the very low figure of T H 7.02, 

 practical neutrality. The reduction of P H varied from 0.09 to 

 0.27 in the different subjects. In the one observation eight 

 minutes after cessation of work, the reaction of the blood, which 

 at the end of three minutes had been P H 7.15, had resumed its 

 original alkalinity of P H 7.30. The bicarbonate content of the 

 blood, however, had not regained its original level and the return 

 to normal alkalinity had been accomplished by a further reduction 

 in CO2 tension. 



The effects of exercise are summarized in the table. 



Summary of Effects of Exercise. 



Subject. 



Time. 



COi, 

 Capac- 

 ity of 

 Blood 

 at 40 

 mm. 

 CO2 

 Ten- 

 sion 

 Vol. 

 %. 



C0 2 , 

 Con- 

 tent 

 Arte- 

 rial 

 Blood 

 Vol. 

 %• 



C0 2t 

 Ten- 

 sion 

 Arte- 

 rial 

 Blood 

 mm. 

 Hg. 



Ph, 

 Arte- 

 rial 

 Blood. 



Remarks. 



N. P. L. . 





45-5 

 34-9 



48.IO 

 34-66 



45-5 

 39-5 



7.27 

 7.18 



Athletic subject in 

 excellent physical 

 condition 



3 min. after exercise 



J. McL.. . 



Before exercise 



48.0 

 323 

 42.5 



50.48 

 32.23 

 41.02 



45-0 

 39-5 

 36.6 



7-30 

 7.15 

 7-30 



Athletic subject in 

 excellent physical 

 condition 



3 min. after exercise 

 8 min. after exercise 



J. E 





41.1 

 26.8 



43-84 

 2301 



43-5 

 3i-5 



7-25 

 7.10 



Normal subject with 

 alcoholic habits 





3 min. after exercise 



P. R. 





44.4 

 256 



45-75 

 25.84 



41-5 

 40.0 



7.29 

 7.02 



Acute tonsillitis, 

 3 days afebrile 





3 min. after exercise 



