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In the theory and methodology of sport training there are issues which are extremely important and which are marginal. As a rule, the first kind of issues becomes the subject of intensive research, whereas the second occasionally and fragmentarily are subject to scientific penetration. Sometimes, these extremely important, although not being sufficiently dealt with, cease to be the subject of interest. It seems that the same lot fell upon the extremely important issue which was and still is – the ability of muscle relaxation. Exercises with „...the biggest tension and the biggest relaxation” were used already in the ancient times”. What is this ability? A partial answer to this question was given by a physiologist W. Farfel: „ Relaxation – a concept widespread in sport, at the same time not having a precise definition and a quantitative dimension (measurement). I consider relaxation as an ability of unrestricted diminution of superfluous and reflexive muscle tension.”. Despite the significant progress in the knowledge about sport training, muscle relaxation accounts for a relatively little exploited reserve in the practice of physical education and sport. There are fewer and fewer such reserves, since in contemporary record-seeking sport, more often it is the odds and ends that affect the final result. The ability to relax muscles is not trifle, since according to scientists and coaches the low level of muscle relaxation inhibits the achievement of maximal sport results. The superficial overview of contemporary literature related to physical education and sport demonstrates that the issue has recently become barely noted, though 20 –30 years ago it was a subject of various research works, carried out by specialists of various scientific disciplines in many countries. Taking into account the evident shortage of new information, as well as the lack of interdisciplinary interpretation of the issue, particularly from the point of view of the science about human movement -antropokinesiology, the work hereby focuses on the achievement of the following aims: definition of the place of the muscle relaxation ability in the science about human movement as well as manifestation of the muscle relaxation ability in various sport disciplines. Search for the relationship between this ability and other movement abilities, establishment of the relation between the level of the ability of muscle relaxation and sport techniques, accompanied by attempt to establish the influence of the ability of muscle relaxation on the effectiveness of technique and on the sport success was also carried out.
Man, when creating modern civilization which releases him from pursuing „hard” physical labor, did not see that the increasing level of technical equipment also requires a high level of manifestation of various movement abilities, particularly those of coordination. The desirable abilities and qualities of a good employee have become: precision of movements, speed and adequacy of reactions, ability to differentiation movements, space-time orientation, adaptation to changing conditions and others. They require an effective functioning of the nervous system. The results of research showed a 93% decrease in the human movement activity in the years 1864–1964. This caused a decrease in the level of movement fitness, and along with it an increase of overweight people of all ages amounting to 1.600 million people worldwide. According to forecasts by the World Health Organization this number may increase by 40% in 2017. A comprehensive approach to the importance of movement was presented by Aristotle, who expressed the relationship very briefly: „Movement is life.” He pointed at the forefront importance of movement by stating: our life begins with it and ends with it. All our creative and reproductive activities, regardless of their nature – productive, professional, artistic, everyday or sport – always manifest themselves in movement! Movement is a universal expression of every living organism! Some consider Aristotle as the father of the science of movement others consider N. Dally who was the author of the first textbook on „Cinesiologie” which contained studies of human movements and their relation to education, hygiene and therapy. The scientific justification for movement became possible only in the twentieth century. N.A. Bernstein with his fundamental works: „The building of movements” and „Outline of physiology of movements and physiology of activities” contributed significantly to the understanding of the essence of movement. His works were much ahead of the times in which he lived himself. N. Bernstein was considered as one of the founders of modern science of movements. This science has many names. The multitude and variety of names demonstrates the interest by numerous specialists of various areas of expertise in this scientific discipline, which has been developing over the years. This interest is justified as the science of movement has a universal meaning. The development of a new scientific discipline opens up enormous and little-known research area. Therefore, it creates prospects for the multi-interdisciplinary research. Out of the proposed names the most appropriate seem to be kinesiology or anthropokinesiology, although the first concept may also apply to animals, whereas the second defines precisely the subject of interest. This name indicates the independence of scientific discipline and emphasizes its scientific status. Its tradition dates back to nearly 160 years, when in 1857 N. Dally called his book „Cinesiologie”. The multiplicity of names reveals the range of the thematic study about movement, as well as the number of competitors among which the competition takes place. Part of this naming emphasizes human movements combined with the structure of the body (Anthropomotorics, Kinantropology, Anthropomaximology), or with psychic manifestations (Psychomotorics, Sensomotorics)
In different countries there is between 5% and 50% of left–handed people; most of them living in Africa. Some say there is over 240 millions of left–handed people around the World. Living in right–handed society do they have to adapt? Because of spreading democracy and tolerance there is a possibility of maintaining the peculiarity i.e. left–handiness. In sport like in other spheres of life the tolerance is an achievement. It means in practice the possibility of taking part in training prepared for right–handed people or its special version for left–handed. The left–handed person usually have to adjust to the training prepared for right–handed. Realization of a certain fragment of the training prepared for left–handed is a great achievement. Usually it is a left–handed person initiative and his own program. It is hard to define the percentage of left–handed sportsmen using this kind of self–perfection. In my many years studies I have not found program of teaching or individualization of training adequate for left–handed people. Since the problem was non existing it the theory of training, it was hard to expect a different situation in practice. It was not mentioned neither in theory of movement learning, anthropokinetics [21] nor in sport kinetics [23]. One of the anthropokinetics handbook [24] mentioned the problem but did not tried to solve it. Only one book [18] took the effort to treat it seriously. The problem of different sport training for the left–handed people is still unsolved, regardless of the fact that it vital for the big part of the population. Basing on own and others autos researches this work tries to bring a solution for this problem.
Explaining the matter of effectiveness of left and right-handed players is very important taking into account the equalizing level of technical preparation of players. Therefore, the study was based on the skills of highly advanced volleyball players from different countries. In the study there was compared effectiveness of performance of left-handed and right-handed players in selected offensive activities. Then the rating of skills of game differentiation made by right-handed players and left-handed setters was executed and there were compared the options of attack performed by left-handed and right-handed players. There were analyzed matches of the highest ranks of the sport competitions: World League 2007–2011 and Olympic Games 2008. The study involved 80 top-level volleyball players, including 22 left-handed ones. There was used an indirect method of an observation. The results draw attention to the role and significance of left-handed players in volleyball. They also show the particular usefulness of left-handed players, whose usage of mirrored technique can add up to a tactical variety of the game.
Investigated the effect of swimming training on the level of strenght accuracy and its stability under conditions of fatigue. Tested 22 swimmers (12 girls and 10 boys). Age – 13 years, training experience – 5 years. The strenght accuracy of measured before and after swimming 2,000 m. It was found that the three-year training cycle improves The strenght accuracy of swimmers. The relationship was linear. The results were varied and must therefore be analyzed individually to properly select training exercises.
Measured maximum power of the lower limbs women - members of the Polish national tennis team. We found a relationships between the maximum power and a place in the ranking of sports. The study involved the leading tennis player in the world, with players in the Federation Cup (n = 4) – age 22 years, training experience 13 years. The control group – female recreational practicing tennis – age 21 years (n = 11). The maximum power of the lower limbs were measured in series of vertical jump. It was found that the players graded higher in the ranking sports are characterized by higher values of maximum power of the lower limbs less trained tennis players.
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