Amigos do tênis, outro artigo que escrevi para a revista tênis sobre os benefícios do tênis de campo para idosos.
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 ) .
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).
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
Email:
jefferson.jcc@hotmail.com
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
Rises to network, how and when to go ?
Currently , the network game is one of the least
trained by practicing tennis. The fact that most professional athletes spend
most of their time in the know during their matches online , does the amateur
player to have less and less reference to go to the network , hampering the
development in this very important aspect of tennis.
To have a good advantage in the network , one must ,
in addition to an improved technique, a good finish on the network , which we
call " approach" . Approach means ball approach, ie , the ball will
bounce and you then go to the network . To do a good approach , one must know
how and when you get to the network because the transition between the baseline
and the network is as important as the coup itself.
First you must know the ideal time to make a approach
. To facilitate the understanding is necessary to divide the block into three
major parts . The 1st part is between the network and a little behind the
service line, the 2nd part will be between the end of the 1st part to two
meters before the baseline , and the 3rd part is between the end of the 2nd
part to the end of the baseline. Batting the balls that bounce the opponent in
3rd part is the least recommended to make an approach . As the ball bounces
with a lot of depth , it hit the ball and try to get the network probably will
not have time to even get to the service line , and therefore make it very
difficult to conduct some groundwork on the network , greatly increasing the
probability of error . Have the balls that bounce in the 2nd part of the court
, are recommended in some circumstances . You need a good analysis of the
height , effect and speed of the ball . When they arrive with too much speed or
too high due to the topspin effect , are not so recommended to make an approach
, due to the difficulty that the ball arrives . However, when the ball lands in
this area , but with little speed and with little effect , can be a good option
to climb. Have the balls that bounce in the 1st part of the court, but these
are the obligation of the player using them to make an approach , it will have
sufficient time to hit the ball and climb with ease to finish the point if
necessary.
With this concept in mind , we can now move to the
second tip . When performing approach , there is the option of directing them
in cross or parallel . First , remember that every time you climb the network ,
you should follow the trajectory of the ball is hit , that is , if you play the
ball cross , must follow the ball move toward the cross , paying for the same
parallel . When the balls are directed to the cross , the time to reach the
network will be higher , reducing the time to get to the network , as well as
opening more angle to the opponent . Already, when the balls are directed in
parallel , arrival to the network will be faster , as well as closing any angle
parallel , leaving only a space to cross the opponent to play the ball ,
decreasing the angles of the court . Thus , we can conclude that when carry out
a approach , try using the balls in parallel , because theoretically , it
increases the probability of winning the points along the network .
The last point to be discussed , and one of the most
important on the network increases , is that often these theoretical bases are
not reflected in practice, and often they need to be changed . An example of
this are the players who are going high and deep balls to the other side of the
block just waiting for the opponent to err . Many of them are completely
vulnerable when your opponent goes to network. Thus, even when an opponent to
play deep balls , you can choose to climb the network , while not in a good
position , because the simple fact of being there already destabilizes the
opponent . Another important point is the fact that many players have much
better forehand than backhand or vice versa . When climbing on the network , if
the following theory , the best choice is to drive the ball in parallel , but
this will also depend on whether the ball is falling at best or worst blow the
opponent . Sometimes it is worth making a cross in the approach , but directing
to blow the opponent weaker than insist on an approach in parallel , but in
directing his best shot .
This leads us to think that even with a good tactical
basis, there is no magic formula . Reading the game as a whole , since the
basic tactics to understanding the opponent , are paramount to success in the
network .
More information
Email :
jefferson.jcc@hotmail.com
References
1.
Treuherz
RF , A. Cornejo Shoes: techniques and tactics of play: strategic preparation ,
mental , physical , nutritional . 2006
Coaching the fundamentals of network " Hilt of volleys "
It is increasingly frequent difficulty of practicing
tennis in running scams on the net , both with the smash volleys . With the
evolution of materials , which have dramatically increased the power in coups ,
and improve the physical capacity of athletes that made them faster and
stronger , made the game become much faster . Thus , the difficulty of
reaching the network was growing , forcing players to spend most of the time at
baseline during matches . This is a major reason to see fewer and fewer athletes
go to network during their matches .
Based on this logic, the practitioners of shoes that
are starting in the sport end up seeing their idols just hit hit the baseline .
When will they train , end up trying to emulate their idols , only practicing
the blows from the baseline . This makes the blows of the network are not
nearly trained compared with baseline strokes , very limited development
practitioners .
The climbs the network are extremely important player
in learning , enabling a very wide range of alternatives for the matches . But
for that to happen , it takes more time to train blows on the network . In this
article, we will discuss the volleys left and right .
First we need to divide the fundamentals of
networking , where volleys at two points . One is the transfer of base line to
the network, which requires proper positioning so that it can perform a good
hit. The other is the mechanics of the coup itself. In this article , I will
comment on the mechanics of the coup , especially the correct grip for the
achievement of volleys .
To make the fundamentals of tennis , we use various
grips . When we perform volleys , the most recommended is the continental grip
. ( See Figure 1). The Continental grip is the same one used to perform the
service, the smach and slice .
Figure 1 www.uniaosh.com.br
An important aspect to be emphasized is that , unlike
the baseline strokes , volleys right and left are insured with the same grip .
It is not necessary to turn the handle , because of issues which I will comment
below.
One might think that the tip of the handle is simple
and easy to perform, but there is great difficulty in practicing tennis on hold
this way . They spend most of the time at baseline , hitting blows forhand (
right) and backhand ( left) , and virtually all exchange the handle from right
to left and vice versa , as the grip of the right and left is different .
Consequently , they end up creating a " good addiction " where
changing the grip to make the blows from the baseline . When they go to the
network , eventually turning the handle without realizing it , making the
training with the Continental grip . But what's the point of not being able to
turn the handle from one side to the other and because the Continental grip is
the most efficient? First, when you arrive to the network , the distance
between you and your opponent drops almost half, with it , the ball will come
much faster the player . If you try to turn the handle, often do not have time
and will delay the coup (contact ball / racket behind the body ) . And already
anticipating for the next articles, contact ball / racquet on volleys is always
ahead of the body . Have the reason for holding the racquet with a Continental
grip is that with this grip your racket is more perpendicular to the ground ,
especially when the racket is a little further away from the body. If your
racket is with the head pointed just slightly to the ground , probably at the
time of your ball will be bounced on the network . Also, when the ball is low
difficulty will be even greater , because the racquet head should be pointing
slightly upwards. To compensate for this incorrect grip without realizing you
rotate your wrist and forearm , but loses firmness hit by sudden movement in
the wrist and forearm , leading to the blow error.
Another problem that occurs with the change of the
grip is the lack of firmness on contact ball / racket . The Continental grip
makes you work much with his fist. He must always be firm so that the racquet
does not vibrate at hand and not completely lose control over the ball . People
who change the grip usually does not have the muscles of the forearm region and
strong enough grip to handle the impact of the ball . This takes time, average
2-3 months to allow the muscles in this region earn a little endurance and
muscle strength , then yes, the evolution of volleys being most notable .
Do not forget , these tips are welcome when practiced
. But to be charged in addition to the training that teachers spend , it is
necessary that during the games in clubs and gyms with friends , you try going
to the network whenever possible, because to have a good volley , you need,
plus a good stroke mechanics , a good finish to the network , which will be the
subject of the next article on volleys .
More information
Email :
jefferson.jcc@hotmail.com
References
1.
Ishizaki
M. T , Castro M. Shoes . Learning and training. 2006
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