HYGIENIC PROTECTIVE SUGGESTIONS. 



grow dull and stupid. In later life we awaken 

 to the fact that there are a great many things 

 we would like to know which we do not know, 

 and we find it a much more difficult task to 

 get our brains to act as we desire them to than 

 it used to be. Study then becomes a burden 

 rather than a pleasure. In the same way, if we 

 do not exercise the voluntary muscles (those 

 muscles which our will controls) sufficiently, 

 they become wasted and soft and flabby, and 

 we feel the effects of their disuse in the in- 

 volutary muscles (those muscles over which 

 our will has not control). The heart does not 

 do its best work, the organs of respiration and 

 of digestion and of excretion are impaired, and 

 the whole structure is apt to suffer. 



On the other hand, if the voluntary muscles 

 are abused by over-exercise and insufficient Results of 

 rest we have other evils to contend against. Overwork. 

 They wear out faster than Nature can supply 

 the new material with which to rebuild them, 

 and we have again the weak, flabby voluntary 

 muscles, and suffering to endure also from a 

 weakened condition of the involuntary. All of 

 these things increase our chances for bacterial 

 invasion. 



Exercise. — Proper muscular exercise then ^ai^i^g 

 is necessary if we preserve our health. Mus- Develops the 



XiiTuscrcs 



cular development of the arms is often very 



noticeable in nurses who give massage treat- 



isi 



