Adaptation of the heart to physical activity – Especially the hearts of the athletes – Features heart
The concept of “athletic heart” was first introduced into literature in 1899, a German scientist Henschen. By this term he meant the enlarged heart of a sportsman and is regarded as a pathological phenomenon. The term “athletic heart” is preserved in the present and is widely used.
The definition given by G. F. lang sports heart; the term “athlete’s heart” can be interpreted two ways: 1) as the heart is more functional (in the sense of ability to meet, through systematic training, higher standards. met him at extreme and prolonged physical work), or 2) as the heart of a pathologically altered, with reduced performance as a result of excessive
stress sports. Production of wooden Windows and pictures
Speaking of sports heart should mention the work of a major Soviet therapist V. F. Zelenin, who regarded the enlargement of the heart as an adaptation and drew attention to the fact that the increased size of the heart of athletes is mainly due to the dilatation of its cavities.
The increase Continue reading
Treadmills are one of the most popular simulators for the home. When you purchase a treadmill you need to consider a few key factors to your choice exactly suit your needs.
On the market now presents a variety of models of domestic treadmills in different price ranges and you should keep in mind that the quality of the equipment depends on its price. Before you to choosing a treadmill – measure the area where you plan to install the treadmill. The average home treadmill has a length of about 160 cm and a width of about
70 cm, however, there are many models that fold, and then you can store them under the bed or in the closet. Selecting a track you can pay attention to the following key characteristics: the track design, programming and warranty.
The design of the treadmill
first, you should pay attention to the engine power (measured in horsepower). It is recommended to purchase the equipment, the capacity of which is less than 2 l/s. The engine of such power will last much longer and the user’s weight may exceed 80 kg.
It is considered that the process is directly related to the working mechanism of striated muscle fibers, is the disintegration of ATP with the formation of ADP and inorganic phosphate. The question arises: how does a muscle cell can provide the contractile apparatus sufficient amount of energy in the form of ATP. i.e. how does the process of muscle activity there is a continuous resynthesis of the compound?
First of all, the resynthesis of ATP is provided by transphosphorylation
ADP with creatine. This reaction is catalyzed by the enzyme creatine kinase:
Creatinkinase path resynthesis of ATP is an extremely fast and efficient as possible (at the expense of each molecule of creatine phosphate molecule of ATP is formed ). That is why for a long time failed Continue reading