The Sanguine Temperament belongs to that class with bright, ruddy complexion, light hair, and full circulation. Their disposition is energetic and spirited, but their power of resisting disease or of bearing protracted exercise is not great, and their ardent character is rather the result of nervous excitability than of vital force. Their power lies in dash rather than in endurance.

The Bilious Temperament is of an opposite description. The circulation is sluggish, the disposition persevering and obstinate; the constitution as a rule is tough, and is capable of severe tasks, under which the sanguine would succumb. These men are good subjects for training, but they require good food and much exercise.

The Lymphatic are of a pale complexion, with delicate skins and full habit of body. There is a torpor about their mental as well as muscular actions. When subject to disease they become peevish and are difficult to treat. When united to a nervous disposition, they are perhaps the worst class of men for training, though we sometimes find much latent energy in them. To a certain extent, nervousness is overcome by habit; but the nutrition of the nerve power ought to be the main point in the advancement of health. The nerves are the controllers of the actions; they regulate the contraction of muscles in the activity of the body. The work done by the muscles depends on the proper adjustment of the mechanism, their guidance and activity on the energy of the nerves. The important work that the nerves fulfill is evident, when we consider that the brain itself needs one fifth of the whole supply of the blood in the body. It must suffer, therefore, if the supply of air to the blood is bad. How easily is accounted for the dull aching of the temples of the athlete accustomed to pure air in a badly ventilated theatre or room. If deficient oxidation of the blood is the cause of derangement to the nervous system, blood of bad quality must be equally hurtful to the muscular. The sensibilities of the internal organs are the disposition of each person to such a degree as to be influenced by the slightest sensation of pain, joy, grief, or any feeling of the mind. The reaction affects the muscular system; all the functions of body are carried on by a system of self and mutual help, so intimately united together as to be dependent for proficiency on one another.