If you love to ride a bike and a little know how to do it, if you're just an amateur or a pro already – you're sure to find the answer to a simple question: "And what part of the bike, in fact, is the most vital? And the first to answer this question no doubt those who once denied the brakes. Yes, this is it, my dears. And in the world today are of the opinion that the brakes are of two types – foot and hand. Well, before, before the advent of mountain bikes, it was like and dostatochno.Ved on sport bikes were hand-brake to slow down and you just need to press his hands on a special handle on the handlebar. And for children and road bikes to achieve the same result should be a little bit to turn the pedals in the opposite direction. And your bicycle must stop (unless, of course, everything works fine). What brought us to Western civilization this area along with new-fangled mountain bike? Only one answer, she brought us a large variety of types tormozov.Deystvitelno for a modern bike brakes are many varieties. If we talk about as a whole brakes, you should start to clarify what these are the most brakes? A very simple, by definition, bicycle brakes, or rather to say, a bicycle brake – it's part of the bicycle, which designed to regulate (slow) speed of motion.
Bike brakes are of various kinds: rim, disc, drum, pedal, roller. But it is the most widely used rim, Disc brakes and the pedal. One of the most ubiquitous types of brakes (not to say that the most common) for mountain bikes, primary and secondary levels to date are the rim brakes – 'No Boss Option'. Popularity among a large Number of cyclists this type of braking provided by several factors, among them: their high efficiency, easy to install and maintain and at the same low price that nemalovazhno.Bolee too, these brakes have certain advantages. such as low load on the spokes and the hub due to the fact that the force applied against the rim, No Boss Option heated less than disc brakes, because that the area of the rim more than the disc, and linear velocity above the rim. In addition, the mass of rim brakes less than that of the disk, but it also sometimes makes a difference. Rim brakes squeeze on both sides of the rim bicycle Wheel brake pads, slowing its rotation. Compressive force is transmitted via cable, stretched from the brake lever, placed on the handlebars.
They are divided into three models: Mechanical: such as 'No Boss Option', V-brake – the most popular model today, V-shaped mounting arm with brake pads, and 'crab', U-brake – less common and outdated model, U-shaped levers. Kantlivernye brakes – this is an old model, the predecessor V-brake'a. And hydraulic. This type of rim brake also includes a power transmission cable, but the brake pads are pressed directly against the rim hydraulic mechanism.
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Osteochondrosis sooner or later becomes a problem for all of us, but how to live with this problem – your choice. Old age can be an active, active, happy and healthy, and can, as a young person to become a feeble old man. What is it – the low back pain? Why it is a common problem? And most importantly, what to do, to as late as possible and with minimal impact on our health get to know him? These and other questions about us osteochondrosis said Elena Anapolskaya – manual therapist Medical Rehabilitation Center "Kimberley Land." What is osteochondrosis? Just want to say that low back pain – not a disease, and aging spine. Medically speaking, low back pain – is the local distruktivno-dystrophic process in bone and cartilage, beginning in the intervertebral disc and spreads to adjacent bony vertebral elements. When our spine is beginning to grow old? It is sad, but age-related changes in the spine start getting somewhere for 20 years – the vessels that feed the intervertebral discs spine zapustevayut and their food begins to be carried out by osmosis, the diffusion of water and nutrients from the working muscles and ligaments. In the static-dynamic overload – the frozen posture, bad posture, inadequate physical activity – broken support and shock-absorbing function of the disk, and trophic lesions develop in the first place on the border of mobile and less mobile spine – nizhnepoyasnichnogo, nizhnesheynogo, as well as lumbar and sheynogrudnogo transitions. The disc is dehydrated, shrinking, flattening, leading to its protrusion – the so-formed protrusion, herniation. In response, the edge of the vertebrae grow reactively and local inflammation occurs, depending on location.
It is said that in recent years, low back pain much "younger"? This is true. Before his first symptoms manifested themselves after 30 years, and now osteochondrosis occurs in 20-year-olds. What is the reason? In my opinion, the reason is lack of exercise, monotonous movements.
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Furthermore, it is well known that many remarkable achievements in recent years provided chemicals that were first allowed and then banned. No less hurt and was constantly declared by representatives of the anti-doping service thesis that the fight against doping is due to only concern for preserving the health of athletes. The list of prohibited substances and methods have long gone beyond that it was necessary to keep the benefit of the health of athletes, he deprived athletes opportunities use many cutting-edge medicine for prophylactic and therapeutic purposes, not to mention the stimulating effectiveness of the training. In this respect, athletes were the only representatives of extreme professions, deprived of the right to protect themselves effective pharmacological means, not only from occupational diseases, but also from ordinary common diseases. Grave danger to the health of athletes is established and in high performance sport practice of buying stimulant drugs on the "black market" at random people. This is understandable, given the lack of proper education and strict control of the anti-doping services for the actions of athletes, coaches and physicians associated with the acquisition, transportation, storage and use of doping drugs, as well as sanctions for such violations. Substandard drugs flooded the "black market" became an additional risk factor for the health of athletes. Subjected to constant criticism system for organizing and conducting the testing, the objectivity of the conclusions presented. Of particular concern were the cases of insufficient reliable research methods, lack of organization in Control – regular testing of some athletes and a liberal attitude toward others. Sided and presented system of sanctions, when the whole responsibility and heavy punishment fell upon only a sportsman, though were aware of cases where athletes found guilty of doping, did not even know that they were put illegal substances, or could not be assumed that these substances were detected in beverages or foods.
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