This exercise acts upon the whole body, tending to bring all parts into normal relationship. 31. EXTENSION OF CHEST Placing your hands against the sides of a narrow door way, allow your weight to come forward upon the hands, the knees straight. Take a full breath, then carry the body back by action of the arms. This presses the shoulders back and causes expansion of the chest, and a deep breath should, of course, be taken. The exercise should be repeated many times. This exercise, as well as all others, should be practiced where the air is pure. Observe that this exercise can be made more severe by placing the feet farther back from the door so that the weight of the body will fall more upon the hands. In this case the hands may be lower. They should be placed slightly below the shoulders. 32. HARMONY OF RESPIRATION AND CIRCULATION Lift the arms as high as possible and grasp a pole which has been placed so that it can barely be grasped on tiptoe, and let your weight rest upon the hands, and endeavor to touch the floor with the heels. One can easily have a pole placed upon hooks as high as possible inside a closet. This exercise frees all the muscles of the back and carries the blood away from the head. It is an exercise especially recommended by Baron Posse for brain workers. After the exercises take a sponge bath, or if preferred, rub the chest and throat vigorously with a rough cloth with cold water. Some people prefer an entire bath, but getting into very cold water often has a bad effect upon the circulation and breathing. The water should not be too cold at first until one becomes accustomed to the unusual stimulation. Rub till dry and warm. Injury may follow if there is not reaction. This program may be lengthened or shortened to suit individual needs. Many exercises can be added by each one according to instinct. Some, for example, those turning to the side, except possibly the relaxing of the shoulders, may be shortened. The exercises may be lengthened also by practicing one a longer period of time, making repetitions of a hundred or more. They may be shortened, too, by giving each movement a shorter period. Each student must study himself and adapt the exercises according to need. Feelings of enjoyment, however, are not a safe guide. We are so apt to let the dull and stupid feeling take possession in the morning and omit the exercises for the day. It takes resolution to perform them but in a few minutes the reward comes in a feeling of satisfaction and rest. The exercises are usually the best means of removing the feeling of dullness. That, indeed, is one of their chief aims. Co-ordinating the performance and the joyous attitude of man will soon cause the exercises to be developed into a habit and one will feel the need of them as much as he feels the need of food.