INTERRELATIONS AMONG COMPONENTS 



405 



§ 147. Several components during physical 



EXERCISE (man) 



In many researches a number of physiological functions have 

 been measured during and after physical exercise. A small series 

 of such measurements has been analyzed above (fig. 176) ; it may 

 be used for further correlations (fig. 185). 



Change in Rate 

 of Cardiac Output +> 

 10,000 



Load 



+400 



Rote of 



+600 +800 

 Op Consumption 



§ 6l~0 +200 



Load Heart 

 Frequency 



Fig, 185. Load in the rate of cardiac output in relation to load (a) in the heart 

 frequency and (ft) in the rate of oxygen consumption; during and after physical exer- 

 cise. Man. The simultaneous movements of two loads at a time are shown in the 

 upper left diagrams. Below are two equilibration diagrams for quantities (a) and (6) ; 

 to the right, one equilibration diagram for quantity (c) ; dash lines during gains, solid 

 lines during losses (recoveries). Corresponding points are connected at diverse intervals 

 of time. All loads are % of the initial rate of frequency, all changes in rate or fre- 

 quency are in % of the initial rate or frequency /hour. The data are those of Hjin- 

 Kakujeff ( '36) in figure 176. 



Three selected components are here interrelated two at a time ; 

 rate of oxygen consumption, heart frequency, and rate of cardiac 

 output. No objection has been found (§72) to treating rates of 

 activities as components ; since rates are now loads, accelerations 

 are their rates of net exchange. It happens that in these three com- 

 ponents all the loads are positive. 



