IIORSE-BACh: RID IXC. 19 



come better and more active under their influence, 

 and when the muscles are much exercised, they gen- 

 erally communicate an increased activity to the 

 viscera. Following work and fatigue, the need of 

 food becomes more frequent and more imperious ; 

 the stomach, more active, digests greater quantities. 



A moderate exercise after meals renders digestion 

 easier and consequently more perfect, so much so 

 that persons who have contracted the habit experi- 

 ence the imperious need of it, and digest badly when 

 they cannot satisfy it. 



Active exercises always cause acceleration of the 

 circulation and respiration. Many movements modify 

 in a very powerful manner this last function ; some 

 by simply accelerating it, others by exacting sus- 

 tained and frequent dilatations of the thorax indis- 

 pensable to the execution of sustained efforts. 



Calorification, which is generally only a result of 

 the nutritive functions, is greatly increased by the 

 force, duration, and specially the frequency of active 

 exercises. We know that perspiration is always more 

 or less increased by those exercises. The other secre- 

 tions or exhalations are not more abundant, some 

 even seem diminished. 



Moderate active exercise renders nutrition more 

 perfect in all the organs of the economy ; there is not 

 one of them that does not show its influence, since 

 all participate in the molecular agitations which the 

 movement of the members cause in the whole body. 



