The more fat you have, the more difficult for you, being engaged in physical exercises, to reduce fat. It’s confirmed with results of research in which the fat expense was measured at performance of physical exercises at five thin people, five persons with excess weight and a five, suffering adiposity. Participants within 90 minutes worked on a velosimulator. The fat expense was measured by means of the isotope injection precisely defining, where and how fat is oxidized.

During training the general growth of consumption of fat acids at people suffering adiposity has decreased on 50 %, and at people with excess weight — on 35 % in comparison with thin. As a rule, physical exercises of average intensity promote growth of burning of fatty adjournment in 2-3 times. Besides, physical exercises promote decrease in quantity of intramuscular fat. It occurs at the expense of more intensive development of catecholamine (such, as epinephrine and norepinefrin) during training.

If volume of fat is big, the organism develops small quantity of catecholamine during training. As consequence, liberation of fat acids from fat cells and their hit in blood is reduced. On the other hand, the mentioned research also says that in a case when volume of fat in an organism is big, the expense of intramuscular fat increases, so the total amount of oxidation of fat in any case is identical. Nevertheless, corpulent people dump less that kind of fat to which the majority of people pay attention — fat which accumulates in organism in the form of fat cells.

The slowed down burning of fat in an organism of the people, suffering adiposity, occurs not only because of the lowered development by an organism of catecholamine, but also at the expense of the raised stimulation of alpha –adrenergic receptors. Unlike beta-adrenergic receptors, which promote fat burning, alpha- adrenergic receptors obstruct this process. At women in the bottom half of body prevail alpha- adrenergic receptors — that’s why to the majority of women so difficult to reduce quantity of fat in this area. It’s curious that when at the people, suffering adiposity, fat is burned, they experience the same difficulties, as well as the women, aspiring to reduce quantity of fat in the bottom half of body.
Besides, at people with excess weight level of residual secretion of insulin is raised. During employment by physical exercises insulin interferes with fat burning (at the people, not suffering completeness, it doesn’t occur thanks to the raised secretion of catecholamine). Secretion of catecholamine at corpulent people is lowered. Anyhow, the metabolic cycle because of it is broken.

How people, whose fat makes powerful percent of weight, can solve the problems connected with oxidation of fat? The food additives containing ephedrine stimulate action of catecholamine in an organism, including their burning effect. To some extent secretion of catecholamine can raise also caffeine, but its action, as a rule, is brief.