Fatty acid metabolism
Fat-burning, fine fatty acid oxidation are known as those chemical reactions in which a fatty acid gives by reaction with an electron acceptor, one or more electrons. In addition, in biochemistry, the term fatty acid oxidation, the metabolic pathways α - oxidation, β - oxidation and ω - oxidation summarized, which are part of the energy supply of the body.
Energy sales
In the digestion of fat fatty acids are obtained by decomposition of fat. They are then fed to the fat metabolism and are available to the body for energy conversion are available. The fat can come from both the diet and the body's fatty tissue. The calorific value of pure fat is 39 kJ / g, or 9.3 kcal / g Adipose tissue does not consist of 100% fat, therefore, only reaches a calorific value of approximately 29 kJ / g, or 7 kcal / g One kilogram adipose tissue or reduce, ie a difference to the rest of the energy needs of 29,000 kJ or 7,000 kcal is needed.
The fat burning in the body is a constant process that takes. The amount depends on the degree of physical activity and thus of the energy consumption. According to studies, a reduced carbohydrate diet by the resulting higher insulin output, fat oxidation by up to 35 %, which can last for six to eight hours after ingestion of a meal.
Fat burning in sports
Athletes and medical professionals often argue, the body would refer during exercise in a certain intensity range its energy mainly from the stored body fat. This intensity range would be individually different, between 60 and 75 % of the individual maximum power can be specified. While at first predominantly metabolized glucose would, would increase the burning of fat within the first half hour after the start of training on a particular characteristic of the intensity value.
The view at the beginning of the training glucose would be mostly burned, is now controversial. Currently it is estimated that the proportion of fat burning depended solely on the strength of the load and the general physical condition.
According to expert studies the fat burning through sport depends on several factors, including the degree of sportiness of the body and the development of muscles. Men burn with the same intensity level less than women. Obesity and insulin resistance reduce the consumption. In studies of lipid metabolism Trained at a stress intensity of 65% untrained was most effective at about 50 % of the maximum power.
Energy is always consumed mainly in sports, depending on the intensity, from the first minute. At moderate loading of consumption is lower than at high. To reduce the weight is not important, how much fat is burned during exercise, but the energy balance, ie how much energy is consumed in total.
With extensive exposure (eg endurance ) is the aerobic energy from fat and carbohydrate combustion ( oxidation of free fatty acids and glucose ) from the start, as opposed to anaerobic energy production during short-term peak loads, such as sprinting. Jogging or walking during lipid oxidation studies, which is stronger than during cycling.
There is no scientific evidence that a marketed as a fat burner dietary supplements would increase fat burning.
Regular exercise is the only effective way to increase the metabolism of lipids during exercise. In particular, endurance training leads to improved equipment of the muscles with enzymes of lipid metabolism. In addition, both the mitochondrial density is increased and the local blood flow improving both of a favorable influence on the fat oxidation.