. The Indians' secrets of health : or, What the white race may learn from the Indian . with carbonic-acidgas, so that deeper and more rapid breathing is neces-sary to rid the body of thispoisonous gas and to take ina supply of oxygen in itsplace, the act of breathing isno longer difficult, embar-rassing, or tiresome, but is,on the other hand, a pleasureand a gratification. Theimpulse which comes fromwithin, from the so-calledrespiratory centers, so excitesthe respiratory muscles thatthey cause the chest to exe-cute the strongest breathingmovements with the greatestease, ventilating every porti
. The Indians' secrets of health : or, What the white race may learn from the Indian . with carbonic-acidgas, so that deeper and more rapid breathing is neces-sary to rid the body of thispoisonous gas and to take ina supply of oxygen in itsplace, the act of breathing isno longer difficult, embar-rassing, or tiresome, but is,on the other hand, a pleasureand a gratification. Theimpulse which comes fromwithin, from the so-calledrespiratory centers, so excitesthe respiratory muscles thatthey cause the chest to exe-cute the strongest breathingmovements with the greatestease, ventilating every portionof the lungs, fill-ing every air-cellto its utmost ca-pacity. Runnersalways have largeand active chests,whereas sedentary persons have chests of limited capa-city and rigid walls. When a chest is not stretched toits utmost capacity many times daily, it rapidly losesits flexibility. This is especially true after the age ofthirty. In persons who have passed middle life, therigidity of the chest is so great that there can be novery considerable increase in size. By development of 45. ONE OF THETRAILS UP WHICHTHE HOPIS CLIMBAT FULL SPEED. THE INDIxVN AND BREATHING the respiratory iiuiselcs the chest capacity may be tosome degree increased, but the proper time for chestdevelopment is in cliildliood and youth. At tliisperiod, also, the integrity of the heart renders possiblewitliout injury those vigorous exercises which are essen-tial to secure tlie higliest degree of chest develo])ment. Probably the best of all exercises for the develop-ment of the chest and breathing powers is position of the body, the head held well back andthe chest well forward, and the active movements ofthe arms and limbs render swimming a most efficientbreathing exercise. The contact of cold water withthe skin also actively stimulates the movement of thechest, while at the same time it renders possible pro-longed and vigorous muscular movements by increas-ing the energy and activity of the musc
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Keywords: ., bookcentury1900, bookdecade191, booksubjectindiansofnorthamerica
