THE MUSCLES AND HOW TO USE THEM 



59 



much to develop feeble and narrow chests, to check the 

 tendency to curvature of the spine and round shoulders so 

 common with school children, and to give muscular strength 

 and vigor to all parts of the body. 



87. Physical Exercises in Schools. Pupils should have 

 some sort of physical exercises provided for them in the 



FIG. 48. Pupils in the Schoolroom of a Lower Grammar Grade 

 taking an Exercise in Light Gymnastics. 



schools, which should be made a part of the regular course. 

 Impure air, lack of proper ventilation, faulty positions long 

 continued, and other conditions unfavorable to health, 

 demand a rest for overtired muscles and overtaxed nerves. 

 This is especially true in large towns and cities, where 

 there is often little opportunity for outdoor games. 



