The experience at Nauheim was so favorable that many physicians took up the practice of having their heart patients exercise {234} regularly and found that it was decidedly to their benefit. If this is true for organic heart conditions, it is even more valuable for neurotic heart cases, though it often requires a good deal of exercise of will on the part of patients suffering from these affections to control their feelings and take such exercise as is needed. In men, it will often be found that the discomfort in the heart region, particularly in muscular, well-built men who have no organic condition, is due more to lack of exercise than to any other factor. This is particularly true whenever the men have taken considerable vigorous exercise when they were young and then tried to settle down to the inactive habits of a sedentary life. Athletes who have been on the teams at college, self-made men who have been hard manual laborers when they were young, even sons of farmers who take up city life are likely to suffer in this way. Their successful treatment depends more on getting exercise in the open back into their lives than on anything else, and for this a call upon the individual's will power for the establishment of the needed new habits is the essential. Former athletes who try to settle down to a very inactive life are almost sure to have {235} uncomfortable feelings in their heart region. At times it will be hard to persuade them that they have not some serious affection consequent upon some overstrain at athletics. In a few cases, this will be found to be true, but in the great majority the root of the trouble is that the heart craves exercise. A good many functional heart cases, like the neurotic indigestions, so called--are due to the fact that the heart and the stomach are not given enough to do. The renewal of exercise in the daily life--and it should be the daily life as a rule and not merely once or twice a week--will do more than anything else to relieve these cases and restore the patient's confidence. We saw during the war that a number of young men, officers even more than privates--that is, the better educated more than the less educated--suffered from shell shock so called. A good many university men may suffer from what might be termed heart shock if they find any reason to be solicitous about their hearts. These neurotic conditions can only be relieved by the will and diversion of attention.