Special alimentary regimen, however, does not constitute the sole treatment of obesity. Concurrently must be employed a number of practical adjuvants which are oftentimes of the utmost assistance. For one thing, exercise is indispensable; all authorities agree on this point. The exercise taken in the gymnasium is one of the best, notably the "wall exercise," which is more particularly suited to those afflicted with pendulous and protuberant abdomens as the result of feebleness of the hypogastric muscles, to accumulation of fat under the skin and in the omentum, and to dilation of the stomach and intestines. In the "wall exercise," the patient stands erect against an absolutely straight and plumb wall, lifts his hands (carrying a weight) straight over the head, and causes them to describe a semicircle forward. Zantz particularly insists upon arm and leg exercise for the obese, especially the former, since with the same amount of effort a larger amount of oxygen is consumed than is possible by the latter. However, of whatever character, the exercise should be continued to the point of fatigue or dyspnoea--three thousand movements daily, gradually increased to twenty-five thousand, if the system can bear it; and under such conditions, not only is there consumption of hydrocarbons, but there is provided a veritable greed for air that augments waste. The experiments of Oertel indicate that loss of weight due to fatiguing exercise arises more particularly from dehydration, which is made good by absorption of the fluids employed as beverage; the fluids are claimed by Germain See to act as accelerants of oxidation. During exercise there is obviously more abundant absorption of oxygen, and consequently greater elimination of carbonic acid, and as a consequence (as shown by researches of Voit), the reserve fat of the economy is attacked and diminished; in intense labor there is an average hourly consumption of about 8.2 percent. of fat. Further physical activity is useful in exercising the voluntary muscles, and thus opposing the invasion by interstitial fat of the muscle fibrils. Extreme exercise also, to a certain degree, exerts a favorable influence on the cardiac muscle, augmenting both its nutrition and its capacity for labor. With the anæmic obese, however, it is necessary to be most circumspect in prescribing forced exercise; also with the elderly obese possessed of enfeebled or fatty heart.