Vitality Supreme

Everyone needs a certain amount of sunlight, and if you cannot take a sun bath regularly every day you should at least wear clothing of a character that will permit the light-rays of the sun to penetrate. I will refer to this again, however, in the chapter on the subject of clothing. After all that we can say in regard to these various methods of stimulating the skin there is really nothing so effective as active exercise for those who are strong enough to take a sufficient amount of it. Exercise, so far as function of the skin is concerned, is valuable because of the copious perspiration which is induced when one gets enough of it. In these days great numbers of people no longer "earn their bread by the sweat of their brow," and their health suffers in consequence. If you do not have to perform such an amount of physical labor as will promote free perspiration, then for the sake of acquiring the very purest quality of blood your special exercise should be sufficiently active and continuous to bring about free perspiration. There is really nothing so effective as a good old-fashioned "sweat" for rapidly purifying the blood. Anyone who perspires each and every day as a result of physical activity, and whose habits are fairly satisfactory in other respects, can depend upon enjoying absolutely pure blood, or a condition which is not far from it. It does not matter what form of physical activity is employed to bring about this result. It may take the form of work that is useful and productive in character, or it may be play that is sufficiently active to cause deep, free breathing and bring out the perspiration. For those who are vigorous enough, cross-country running, wrestling, boxing, tennis and other games which involve real muscular effort continued for some time, will all prove satisfactory for this purpose. If you are anxious to purify your blood in cold weather it might be well to wear a good heavy sweater while taking such exercise in order to maintain a marked degree of warmth and thus bring out the perspiration in plentiful quantities. It is always well to avoid becoming chilled too quickly after exercise of this kind.