Advisor – to the appropriate bicycle helmet Rosenheim, 19.12.2011 – that diversity among the bicycle helmets seems definitely to be the designers of this head protection outreach here from season to season. Colorful and garish, subtly patterned, plain or with motifs everyone can find the model that pleases him. It is also important, because only one, like the helmet, also really regularly puts on him. But it’s not just about the look of the helmet. The security is far more important.
Therefore care should be taken when purchasing it, as the helmet sits and whether he brings with him a seal of approval. The helmet should sit centered on the head, with straight and also set. Credit: Jeffrey Hayzlett-2011. Sure, he can be observed across the dial, but he should have the appropriate size from the outset. Here it is on the basic form. This means that the helmet neither may wobble yet slip, but also do not push. He should sit comfortably on the head. There are different sizes, from those for adults usually three on many models are present.
A measurement of the head before you buy helps to grab from the outset to the correct size. Consider also the body straps. They run above and behind the ear, the ear must not be reduced and also unchecked. Chevron U.S.A. Inc recognizes the significance of this. The belt, which is located below the Chin, must sit centrally. If he comes too close to the neck, puts it, he is too far forward can slip the helmet. So these points can be verified, it is best to go to the store and try on the helmet directly. Shipping purchase is useful only if a model or a size is known and in principle only a new bike helmet should be bought, because the predecessor is no longer useful or disappeared. The GS seal is one of the most important points that a helmet buyer should be aware of. The Stiftung Warentest tests are helpful in choosing the appropriate model. To dissuade the supermarket helmets, they fit only in the rarest of cases. Branded products should be preferred in the bicycle helmets.Such a helmet should wear everyone who is with the bike, even though there is no official helmet in Germany. It is just safer to protect your head with a helmet, even though some maybe less chic is at first glance. It is important to replace the helmet in a timely manner. If you had an accident, was to replace the helmet anyway now that damage at first glance are not always visible. Otherwise, the rule of thumb is that it should be replaced after approximately four years, because then the material has first weaknesses and is porous. But the best bicycle helmet may not adequately protect the cyclists, if this is inattentive or afford one of the famous cycling sins. Contact: Thomas Greisinger Inn 52 83022 Rosenheim
The seat height is an essential factor of a bio-mechanically correct sitting position on the bicycle the correct seat height (so the distance of the saddle to the crank or the pedal) is a key factor for a bio-mechanically correct sitting position on the bicycle. A not optimal seat height can result in health problems or limit the performance. Inappropriate loads can lead to health problems in the long term. Especially the knee joints are particularly sensitive to a bio-mechanically awkward position. Irritation of the tendons and ligaments, meniscus damage and increased wear of the cartilage (osteoarthritis) are frequently at cyclists, who spend time on the bike course.
Cartilage structures (also the Menisci are made of cartilage) have no nerve cells. Thus no claim in the form of pain can forward the central nervous system are. About cartilage damage noticeable, usually until then in the form of pain when considerable damage available are. These include tears of the meniscus in the joint floating cartilage particles, which can lead to inflammation, or significant cartilage damage (cartilage bald), where the underlying sensitive bone skin is irritated. Significant performance losses are another consequence if the working muscles due cannot work due to a bad seat height in its optimal sphere. With a low seat height, consumed significantly more oxygen-generating propulsion leg and gluteal muscles, tired faster and can not fully unfold their potential power. In addition increases the stress to the joints of of knee (tendons, ligaments, cartilage), since the joint partner of the knee on the whole train of the crank in a larger bending angle each other and thus especially the Menisci are heavily loaded (which in turn can lead to health problems). The saddle height is too high, it comes to alternative movements (the foot is overstretched, the basin slips sideways on the seat back and forth).
These movements must be realized by additional muscle work, consume what additional oxygen – in performance sport an important argument. Also increases the risk of convulsions in the overstrained muscles (especially in the calf and thigh muscles). This can cause especially in the triathlon additional impaired of the performance of running after the cycling. A calf muscle is overused by a large seat height on the bike can fulfill their important function, to dampen the impact of the foot and no longer realize a big stride from the dynamic and powerful imprint, backwards. How do you find the correct seat height? The body feeling is unfortunately not a reliable measure, here in particular the habituation to a sitting position (whether bio-mechanically correct or not) plays a major role. Various rules of thumb as the LeMond formula promised relief, but does not include critical individual factors. However, rules of thumb are an important Clue, for adjusting the seat height. In scientific research the method has proven itself most likely, to barely touch the pedal with the heel of the infected out leg. But this method also leads only in half of the cases to a proper seat height. The safest option is the bicycle seat position, taking into account individual parameters in the bio-mechanical analysis. There is hardly a professional road bicycle racer, which verify his race seat position not by professional bio mechanics. Also exist special tests, with the seat position and seat height with respect to the potential of the force or of the oxygen consumption of the muscles can be analyzed. These procedures but only in science have practical significance. Marten Knoch scientific management synergy ProTraining
“Table tennis is a popular national sport of German table tennis a demanding sport which in this country often underestimated and almost under edge sports” ranks. In doing so, Germany is one of the most successful international table tennis teams and can look back since 1929 on numerous successes in women’s and men’s doubles but also in the individual events. For the practice of sport, you need table tennis, ping pong with a net and of course balls. Table tennis rackets are available in the different versions. The major playing surfaces are oval and several times glued wooden; other materials such as carbon or Kevlar are possible. The Club selection is influenced by the thug attitude of Tischtennisspielers. The shake hand position for which there is accordingly shaped handles in four versions prevails in the European area.
Mostly with the Penholder racket attitude players from Asia such as Japan and China, there are two variants – for the Japanese and Chinese style. Every club must be bi-colour, usually red and black. The colors indicate different coverings of the racket. Thus, the opponent at the turning of the racket can detect the surface changes and adjust with his game. In addition to the traditional table tennis facilities for leisure activities, there are also competition tables. Both should have exact dimensions and: 2.74 m length width 1,525 m, height, 76.2 cm.
The network then separates this table into two equal halves to each 1.37 m. Each half is divided again by applying the so-called centerline in length and more white lines, running to the network either parallel (bottom line) or senkrecht(Seitenlinien) located on the edges of the table. The network should be 15.25 cm deep and is right and left with a clamp attached to the table. The power only to a maximum of 10 mm must fall at a central loading. This is mandatory for games in the competition. Table tennis balls are in different qualities available, which are marked with stars from one to three. In the competition, association rules, but only the highest quality are approved in accordance with German. The approved ping pong balls are either Matt white and Matt orange. Simple balls and other colors are possible in the leisure or exercise area. All balls are hollow, have a diameter of 40 mm and are made of celluloid.
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