segunda-feira, 24 de fevereiro de 2014

Hilts of Forehand

The forehand is one of the most important hit of tennis field. Along with the serve, forehand from the construction that happens almost every point of the professional players.
To have a good forehand, foremost we must wield the racquet properly. Currently, there are three different types of grip to perform the forehand. Each has its qualities and its defects. In this article, I will comment on the three types of forehand grip and the strengths and weaknesses of each of them.
Previously, all players used the Continental grip to perform the forehand. Over the years, due to the evolution of materials and research in biomechanics, the way to hold the racket was changing. Currently there are three types of grip for the forehand ground, namely:
ü  Eastern: The Eastern grip is shown in Figure 1. To understand how to handle it just place the right palm on the strings of the racket and slide it toward the cable, closing it on him
ü  Semi-Western: The Semi-Western grip is shown in Figure 2. To understand how to hold it, break footprint Eastern, turn right hand to the right, making the palm rest on the wide face of the cable racket ( face 4 )
ü  Western: The Western grip is shown in Figure 3. There are three ways to check out this footprint. Make sure the "V" of the hand is between two and four out of the racket face. See, also, if the bone window is between four and five face. Finally, make sure the ropes are fully pralelas racket to the ground.

Note: The Continental grip is used when the forehand slice is performed.

Figure 1                                                  Figure 2                                                   Figure 3

From the description of the three handles, we can mention the main strengths and weaknesses of each about the height of the contact point on the distance of the hit relative to your body and the amount of effect generated. We examine these separately below.

Distance and height of the contact point
The point of contact between the racket and the ball changes according to the hilt. The point of contact with the Eastern grip is more along the body. Those who use the Semi-Western grip, the point of contact must be made a little more ahead. Finally, those who use the Western grip, the point of contact with the ball are more forward. Thinking that aspect, players who use the Eastern grip has more time to hit the ball when compared with those who hold the racket with the Semi-Western grip and mostly Western.
The height of the racket during the contact point between the paddle and the ball is also influenced by the hilt. The height of the racket is lower for those who use the Eastern grip. For those who use the Semi-Western grip, the height of the racket is higher. Have the players, who wield the racquet with the Western, the height of the racket during the contact point is even higher. In this context, players who use the Eastern grip have an easier time low bounce balls and more difficult to counter high balls. For players who wield the racquet with Western, they are better able to bounce high balls and more difficult to counter low balls. Thus, those who hold the racket with Western grip and flex your knees need to get a good base ball bat.
As we can see, a relationship between the distance and height of the contact point. As the contact ball/racket is more forward, your arm will automatically get higher, and therefore the height of the contact point will also be higher.

Generated effect
Players who hold to the Western grip can generate much throttle on the handle with relative ease. This happens by itself in the characteristic footprint of the racket. This acceleration causes players who use the Western grip generate a lot of topspin on the ball effect when compared with those who hold to the Eastern grip.

Even with all these positive and negative comments pertaining to the hilt, I think the ideal for the forehand grip is that which one feels most comfortable. The main point is to avoid the extreme grips, which are Continental and Western, especially in the initial learning. As is happening to the evolution of the player can be made to exchange grip, according to the need and desire of the player.

More information:
Email: jefferson.jcc@hotmail.com

References
1.      Treuherz RF , A. Cornejo Shoes: techniques and tactics of play: strategic , mental , physical , nutritional preparation. 2006

Empunhaduras do Forehand

O forehand é um dos golpes mais importantes do tênis de campo. Junto com o saque, a partir do forehand que acontece a construção de praticamente todos os pontos dos jogadores profissionais.
Para ter um bom forehand, antes de mais nada é preciso empunhar a raquete de maneira adequada. Atualmente, existem três tipos diferentes de empunhadura para a realização do forehand. Cada uma delas tem suas qualidades e seus defeitos. Nesse artigo, comentarei sobre os três tipos de empunhadura do forehand e as qualidades e defeitos de cada delas.
Antigamente, todos os jogadores utilizavam a empunhadura continental para realizar o forehand. Com o passar dos anos, devido à evolução dos materiais e das pesquisas na área de biomecânica, a maneira de empunhar a raquete foi se modificando. Atualmente existem três tipos de empunhadura para o fundamento forehand, sendo elas:
ü  Eastern: A empunhadura Eastern está demonstrada na figura 1. Para entender a forma de segurá-la basta colocar a palma da mão direita sobre as cordas da raquete e deslizá-la em direção ao cabo, fechando-a sobre ele
ü  Semi-Western: A empunhadura Semi-Western está demonstrada na figura 2. Para compreender como segurá-la, parta da pegada Eastern, gire a mão direita para a direita, fazendo com que a palma da mão repouse sobre a face mais larga do cabo da raquete (face 4)
ü  Western: A empunhadura Western está demonstrada na figura 3. Há três formas de conferir essa pegada. Verifique se o “V” da mão está entre a face dois e quatro do cabo da raquete. Veja, também, se o osso do indicador está entre a face quatro e cinco. Finalmente, confira se as cordas da raquete estão totalmente pralelas ao chão.

Obs: A empunhadura Continental é utilizada no forehand quando é realizado o slice.

Figura 1                                                  Figura 2                                                   Figura 3
    
A partir da descrição das três empunhaduras, podemos citar as principais qualidades e defeitos de cada uma delas sobre a altura do ponto de contato, sobre a distância da batida em relação ao seu corpo e sobre a quantidade de efeito gerado. Examinamos esses itens separadamente a seguir.

Distância e altura do ponto de contato
O ponto de contato entre a raquete e a bola muda de acordo com a empunhadura. O ponto de contato com a empunhadura Eastern é mais ao lado do corpo. Aqueles que utilizam a empunhadura Semi-Western, o ponto de contato precisa ser realizado um pouco mais á frente. Por fim, quem utiliza a empunhadura Western, o ponto de contato com a bola é ainda mais a frente. Pensando nesse aspecto, jogadores que utilizam a empunhadura Eastern têm mais tempo para rebater a bola quando comparado com aqueles que seguram com a raquete com a empunhadura Semi-Western e principalmente Western.
A altura da raquete durante o ponto de contato entre a raquete e a bola também é influenciado pela empunhadura. A altura da raquete é mais baixa para aqueles que utilizam a empunhadura Eastern. Para aqueles que utilizam a empunhadura Semi-Western, a altura da raquete é mais alta. Já os jogadores que empunham a raquete com a Western, a altura da raquete durante o ponto de contato é ainda mais alto. Nesse contexto, os jogadores que usam a empunhadura Eastern têm mais facilidade de rebater bolas baixas e mais dificuldade em rebater bolas altas. Para os jogadores que empunham a raquete com a Western, eles têm mais facilidade em rebater bolas altas e mais dificuldade em rebater bolas baixas. Dessa forma, aqueles que seguram a raquete com a empunhadura Western precisam flexionar bem os joelhos para conseguir rebater uma boa bola baixa.
Como podemos perceber, a uma relação entre a distância e altura do ponto de contato. Conforme o contato bola/raquete é mais a frente, automaticamente o seu braço irá ficar mais alto, e conseqüentemente a altura do ponto de contato também ficará mais alta.

Efeito gerado
Os jogadores que seguram com a empunhadura Western conseguem gerar muita aceleração no punho com certa facilidade. Isso acontece pela própria característica na pegada da raquete. Essa aceleração faz com que jogadores que utilizam a empunhadura Western gerem muito efeito topspin sobre a bola quando comparado com aqueles que seguram com a empunhadura Eastern.

Mesmo com todos esses comentários positivos e negativos referente às empunhaduras, penso que a empunhadura ideal para o forehand é aquela que a pessoa se sente mais confortável. O ponto principal é evitar as empunhaduras extremas, que são a continental e a Western, principalmente no início do aprendizado. Conforme vai acontecendo à evolução do jogador, pode ser feita a troca de empunhadura, de acordo com a necessidade e vontade de cada jogador.

Maiores informações:

Referências
1.      Treuherz RF, Cornejo A. Tênis: técnicas e táticas de jogo: preparação estratégica, mental, física, nutricional. 2006

domingo, 9 de fevereiro de 2014

sábado, 4 de janeiro de 2014

Correct grip Serve

Currently , the valuation of the plea withdrawal has increased significantly in world tennis. Clearly the serve is one of the most important fundamentals of tennis field , with primary factor in the victories of the practitioners of the sport .
However , many practitioners of shoes that start in the sport without the aid of a skilled professional end up carrying the sack with some incorrect movement patterns , hindering the evolution of this very foundation so important .
One of the major mistakes is using the incorrect grip . Much of practitioners hold the racket with the Western forehand grip ( Figure 1 ) .

                                                                Figure 1

With this type of grip you lose the levers of the body that generate power in the coup , and limit the player to serve only with the flat serve ( stoned ) .
The big problem the wrong way to handle the defects are generated , which in turn are very difficult to be corrected by teachers . The great difficulty in removing these vices is due to the fact at the time that the teacher will change the grip of the student, he feels much laxity during the course of withdrawal , because using the correct grip ( see below ) the use of wrist during the sack is widely used.
Given this information , what is the proper way to hold the racket to cash out ? The literature shows that the most appropriate is the continental grip ( Figure 2 ) .

                                                                   Figure 2

 With the Continental grip , it takes a larger aid of the lower limbs , trunk , shoulder, arm and forearm to generate power in the coup . Thus , since the beginning of learning the player is already stimulated to work throughout the body to carry the loot . Players holding incorrectly , have a limitation of motion mainly upper limbs , reducing significantly the generation of power in the coup , and increase the likelihood of injury .
Another important factor is the ability to make withdrawals in effect . The handling of the racket with the Continental grip much more freedom to move the wrist at the time of withdrawal, allowing counter with racket on the ball at different angles . From the racket - ball contact angles in the sack with other effect arises . Have the players who handle the racket handle with incorrect lose the freedom of movement of the wrist, restricting the ability of the player to vary the serve .
The great difficulty in learning the Continental grip is to hold that way at the beginning of learning . As discussed above , with the use of this grip handle is very large , and this overload on the handle generates firmness loss at the time of the coup . However , as the stimulus for draw with the continental grip increases , the region of the wrist is gaining more strength , decreasing laxity , besides having considerable power increase .
From the second training with the Continental grip month , the evolution of looting increases considerably, both in increased power generation and in effect. Therefore , always start the foundation serve using the Continental grip , because the long term benefits are huge .

More information
Email : jefferson.jcc@hotmail.com

References


1.      Ishizaki M. T , Castro M. Shoes . Learning and training. 2006

Empunhadura correta do saque no tênis de campo

         Atualmente, a valorização do fundamento saque tem aumentado de forma expressiva no mundo tênis. É evidente que o saque é um dos fundamentos mais importantes do tênis de campo, sendo fator primordial para as vitórias dos praticantes da modalidade.
      No entanto, muitos praticantes de tênis que iniciam no esporte sem auxílio de um profissional especializado acabam realizando o saque com alguns padrões de movimentos incorretos, dificultando muito a evolução desse fundamento tão importante.
         Um dos principais erros cometidos é a utilização da empunhadura incorreta. Grande parte dos praticantes seguram a raquete com a empunhadura Western de de forehand (figura 1).


Figura 1

           Com esse tipo de empunhadura você perde as alavancas do corpo que geram potência no golpe, além de limitar o jogador a sacar apenas com o saque flat (chapado).
           O grande problema de segurar de maneira errada são os vícios gerados, que por sua vez são muito difíceis de ser corrigidos pelos professores. A grande dificuldade em retirar esses vícios se deve ao fato de no momento que o professor vai trocar a empunhadura do aluno, ele sente muita falta de firmeza durante a realização do saque, pois utilizando a empunhadura correta (ver a seguir) à utilização de punho durante o saque é muito utilizada.
         Dada essas informações, qual a maneira adequada de segurar a raquete para sacar? A literatura mostra que a empunhadura mais adequada é a continental (figura 2).

Figura 2

           Com a empunhadura continental, é preciso um auxílio maior dos membros inferiores, tronco, ombros, braço e antebraço para gerar potência no golpe. Sendo assim, desde o início do aprendizado o jogador já é estimulado a trabalhar todo o corpo para realizar o saque. Jogadores que seguram de maneira incorreta, possuem uma limitação de movimento principalmente de membros superiores, diminuindo de forma expressiva a geração de potência no golpe, além de aumentar a probabilidade de lesões.
         Outro fator importante é a possibilidade de realizar saques com efeito. O manuseio da raquete com a empunhadura continental da muito mais liberdade de movimentar o punho no momento do saque, possibilitando rebater com raquete na bola em diferentes ângulos. A partir do contato bola-raquete em outros ângulos surge o saque com efeito. Já os jogadores que manuseiam a raquete com empunhadura incorreta perdem a liberdade de movimento do punho, restringindo a possibilidade do jogador de variar o saque.
             A grande dificuldade no aprendizado da empunhadura continental é segurar dessa maneira no início do aprendizado. Como comentei anteriormente, com essa empunhadura a utilização do punho é muito grande, e essa sobrecarga no punho gera perda de firmeza no momento do golpe. No entanto, conforme o estímulo por sacar com a empunhadura continental aumente, a região do punho vai ganhando mais resistência, diminuindo a falta de firmeza, além de ter aumento de potência considerável.
           A partir do segundo mês treinando com a empunhadura continental, a evolução do saque aumenta consideravelmente, tanto em aumento de potência quanto em geração de efeito. Sendo assim, sempre inicie o fundamento saque utilizando a empunhadura continental, pois os benefícios a longo prazo são enormes.

Maiores informações

Referências

1.      Ishizaki M. T, Castro M. Tênis. Aprendizagem e treinamento. 2006

Traditional Techniques of Foot and Foot - Up -Back in the Sack Achievement in Tennis Field

The Booty is one of the most decisive in the final outcome foundations of a match for both amateurs as well as professionals players . However , just as the looting has enormous power during a match , the biomechanics of withdrawal is the most complex and difficult to be performed among all the essentials. For this reason , the training teams have given more importance to the plea withdrawal.
One of the most important aspects of the transfer is driving the legs . It is from the lower limbs that is generated to transfer the body to the ball . There are two different techniques for performing the transfer ( Figure 1 )

                   Figure 1 : Técinica Foot - Foot and back -up .            www.ludgerobraga.com

1. Foot -back ( feet apart ) : A technique that consists of maintaining the initial distance between the members .
2 . Foot -up ( feet together ) : the technique of the approximation of the lower limbs during the execution of the service .
Making a comparison between the two techniques when it comes to peak vertical force , ie, the upward momentum of the body can achieve , Foot -up technique has greater vertical force compared to the the Foot -back technique . Thus, the point of contact racket - ball puller will be added to the Foot -up technique.
With this feature biomechanics , we can direct certain technique for the player. Players with short stature may benefit from using the Foot -up technique. Because this technique to increase the vertical force , they can increase the height of the point of contact racket - ball, getting a better use for drawing .
However, it is important to note that these changes in the biomechanics of looting take some time to have results . Also, the player needs to feel comfortable with the new technique . Many players have the facility to carry out some technical and other difficulties and should balance the extent to which this change can generate some benefit . If the player feels loose and move freely change is certainly welcome .
Important to note that these tips are for players who already have enough experience in the sport . Beginning players need to work other aspects of withdrawal initially , mainly an increase of the ball and coordinated all segments of the body work on the serve motion.

More information
Email : jeferson.jcc@hotmail.com

References


1.      LB Neto , Serrao JC , Amadio AC . Study of dynamic and kinematic characteristics of tennis serve - Comparison between two techniques

Backhand with one or two hands , which to choose?

When a student starts in tennis , in addition to learning all the basics , you need to choose how you want to learn the backhand (left for righties ) . There are two ways to perform the backhand they are , with one hand or with two hands . To help you choose , will be discussed the main advantages and disadvantages of both.
Backhand with one hand : The main advantages of this style are the sensation of striking a more " loose " form the ball , hit it with relative ease in slice and greater reach on the ball if it is compared with the two-handed backhand . Have the main disadvantages is the lack of firmness to return very fast balls , especially in returns of serve, the fact can not back the coup and the difficulty in hitting high balls .
Backhand with two hands: The main advantages of this style are the strongest to swing too fast balls , especially on returns of serve, the aid of non- dominant hand , mainly helping to compensate when a pass bounce and ease in hitting high balls . Have the main disadvantages are the feeling of being " stuck " during the performance of the coup to be using the non-dominant arm during the strike , strike with some difficulty and slice smaller range on the ball if it is compared with the one-handed backhand , having to intensify the leg work to always be near the ball.
As previously mentioned , both the backhand with one or two hands has its advantages and disadvantages . Not a criterion for choosing a style or another there . I think that the most relevant factor is that style feels more comfortable .
However , the student can follow a few tips to help you with your choice. Most adult men choose the backhand with one hand , because almost everyone feels looser , with freer movement while performing the blow. The women end up having preference for two-handed backhand because they feel much more strongly at the time of the coup , managing to generate more power . Very high and low mobility people have a preference for one-handed backhand by difficulty moving around the court .
Important to note that many practitioners tennis swap style quite frequently , not getting any developments in the forms . Search definitively choose the style that suits you and believe in it , especially when you're going through a bad phase , because that is when the change occurs from one style to another.

More information
Email : jefferson.jcc@hotmail.com

References


1.      MT Ishizaki , M. Castro Tennis : Learning and Training . 2006