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4²

ANDERSONA PHYSICAL EDUCATION.

coramon defect, it is necessary to strengthen thc muscles across thc upper back and to keep thc chest arched.

Therć are results coming from thc dcvelopment of the neck muscles that are quitc as important as the mere car-riageof the head, namely: the strengthening and enlarging of the blood-vessels of thc neck. whereby the circulation of blood is greatly improved and the congcstcd States of thc brain, due to continued mental activity. are morę quickly rclieved.

The weight of the brain is about one forty-fifth of the body, while thc amount of blood used up in the brain is about one-eighth or onc-ninlh of that required by the

w hole body.

Thus it will be cvident that the supply should have free and ready access to the interior of the skuli.

Ali exercises for thc neck will tend to help the circulation to and from the brain, consequently ccrtain forms of headache will be relievcd by slow and steady movements of the head, neck, and upper trunk.

Brain workcrs are morę in need of slow head movements than manuał laborers.

Sec the exercise on page 83 for headache and nervousness.

A special exercisc for the back of the neck may be madę by placing thc handlcson top of thc head. and whilc* holding them there witb the hands. let the head go forward and compel the muscles to draw it back; r peat the move-ment umil * muscles on the back of the neck are slightly fatigu d. Be carefui not to assist the mo\ ement with th arnis, and to hołd the rest of the body perfectly still.    ¹

NOTĘ.—Take all head and bodv movcments slowly.