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Tóm tắt nội dung (trích từ tài liệu gốc): Beginning Tennis - Study Guide One of the enduring beauties of tennis is that people of all sizes, shapes, ages and physical abilities can enjoy playing tennis for the rest of their lives. Tennis is a skill sport that is based primarily on learning to handle the racket in order to direct the tennis ball. Everyone learns differently, some visually, verbally or by using their kinesthetic senses ("get the feel) of a motion or shot. We will have a "show and tell" presentation of the KEY CONCEPTS of the game. Whether you are a serious tennis player who is highly skilled or an occasional player who
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Nội Dung Gốc (Tiếng Anh)¶
Beginning Tennis - Study Guide
One of the enduring beauties of tennis is that people of all sizes, shapes, ages and physical abilities can
enjoy playing tennis for the rest of their lives. Tennis is a skill sport that is based primarily on learning
to handle the racket in order to direct the tennis ball.
Everyone learns differently, some visually, verbally or by using their kinesthetic senses ("get the feel) of
a motion or shot. We will have a "show and tell" presentation of the KEY CONCEPTS of the game.
Whether you are a serious tennis player who is highly skilled or an occasional player who plays strictly
for fun, you can improve your performance by understanding a few key concepts of the game.
KEY CONCEPTS - THE KINETIC CHAIN
Hand & Racket The Kinetic chain is a coordinated activation of the segments of the body starting
with the ground reaction force to the feet on the ground and ending with the
Wrist acceleration of the racket through the ball. Its purpose is to place the end segment,
Elbow the hand and racket, in the optimum position at the optimum velocity to best
Shoulder "make the ball go". Efficient use of the segments creates a racket velocity that is
Trunk & Back much more than the sum of its parts. The largest portions of kinetic energy or force
Legs generated in the stroke are developed in the legs and trunk. The kinetic chain is
Feet oriented to converting linear or straight line momentum to angular or rotational
Ground momentum around a stable post leg.
There are several reasons for kinetic chain breakage, but the most common include
muscle weakness, muscle inflexibility, joint injury and poor mechanics of the stroke.
KEY CONCEPTS - THE READY POSITION & FOOTWORK
The ready position in tennis is much like the ready position in other sports. The infielders in baseball and
the defensive backs in football use similar ready positions. To receive most shots, you should be a step
behind the baseline with your feet shoulder width apart, weight on the balls of your feet (happy feet)
and your knees bent slightly. A balance step (Split-step) is used when hitting shots within a point. It is
made by evenly placing your feet shoulder width apart with your weight evenly distributed on each foot.
Your torso should be forward. Both hands should be on the racket, with your eyes focused on the ball on
the other side of the net. Be relaxed and ready to react.
Your footwork should get you to the ball in a proper hitting position. Keep your feet moving, never stand
still, since the ball will rarely come to you in a perfect position to be hit. Footwork is one of the most
important fundamentals of tennis. Good footwork gets you into the best possible position from which to
execute your shots.
When waiting for the ball assume an active ready position, prepared to move quickly in any direction. As
soon as the ball leaves your opponents racket use your eyes to pick up the ball and determine its
direction so you can move toward it. Your first step is accompanied by a turn of the hips and shoulders,
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thus initiating the backswing. Your weight should be on your back foot and your racket should point to
the back fence. When transferring your weight forward (with large, small or diagonal steps) get in a
good position to stroke the oncoming ball. Pushing off on the balls of your feet contributes to a quicker
start. Shift your weight forward as you make your swing and contact the ball as you follow through
across the midline of your body and over your opposite shoulder. After hitting the ball recover quickly to
your ready position.
KEY CONCEPTS - THE GRIP
Grips are the foundation of tennis strokes. How you position your
hand on the eight sided handle has a direct impact on each ball you
hit. To find a grip, use the base knuckle of your index finger as the
main reference point. The diagrams for each grip show the top view of
a racket handle that has four main sides and four narrower bevels
between the sides. The top facing bevel is 1, move clockwise for 2
thru 8 (Lefties reverse). Hold the racket firm, not loose or tight.
Eastern Forehand Grip
This grip is best for beginners and intermediate players. It provides
feel, control, and the right angle to the racket head when swung
properly. Place your hand flat against the strings and slide it down to
the grip, shake hands with the racket. The base knuckle of your index
finger slides onto bevel 3. It's easy to switch quickly to other grips
from the Eastern Forehand.
Continental Grip
This grip is used primarily for serves, volleys, overheads, slices and
defensive shots. Find it by putting the base knuckle of your index
finger on bevel 2, which puts the V created by your thumb and
forefinger on top of the handle. This grip allows your forehand and
wrist to naturally pronate when serving and hitting overheads. On
volleys it provides a slightly open racket face for underpin and control.
You can hit flat or with slice with the Continental grip but it is tough to
put topspin on the ball.
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Eastern Backhand
This is the one handed backhand. From a Continental grip, shift your
index finger knuckle one bevel counterclockwise (clockwise for lefties)
so that it is on the very top of the grip on bevel 1. This is a good
versatile grip that provides good stability to the wrist. You can roll the
ball for some spin or hit through it for a more penetrating ground
stroke. The Eastern backhand grip is not ideal for hitting topspin shots
near shoulder level. It also can be difficult to control high bouncing
balls.
Two Handed Backhand Grip
If you are finding that you don't have enough strength, control, or
consistency with the one handed backhand try the two handed
variety. A more compact stroke than the one hander, the two hander
relies on shoulder rotation and an efficient swing to provide power.
There are probably as many variations of a two handed grip as there
are people using the two handed stroke. The soundest mechanical
grip utilizes a Continental grip with the right hand and an Eastern
forehand grip with the left hand. One of the main advantages of the
two hander is your ability to disguise your shots, however you reach is
limited.
Semi-Western Forehand Grip
Moving your index finger knuckle one more bevel clockwise (counter
clockwise for lefties) to bevel 4 from the Eastern forehand grip puts
you in a semi Western grip. This has become a prevalent grip for
power baseliners on the pro tours. This grip allows you to put more
topspin on the ball and take a bigger swing at the ball as the added
topspin will help keep the ball in play. Since the grip naturally closes
the racket face, forcing you to swing up from underneath the ball, it
can be difficult to return low bouncing shots with this grip.
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KEY CONCEPTS � FOREHAND GROUNDSTROKE
Always start from a ready position
The forehand is a full body motion
The body summates the velocity of different segments �The Kinetic chain
Stroke production: preparation, backswing, forward swing, contact and follow through
Prepare with an early shoulder rotation and pivot of the feet as soon as you see the ball
coming off your opponents racket
Activate the loop (circular) or a straight back backswing
Swing from slightly low to high, with the follow through extending high and across the
midline of your body.
Make contact with the ball in front of your left leg, opposite for lefties
Maintain a full, synchronized sequence to the timing of the stroke
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KEY CONCEPTS � BACKHAND GROUNDSTROKE
Always start from the ready position
Prepare with an early shoulder rotation and pivot of the feet
Get your racket back fast and move to the ball
Activate the loop or a straight back motion backswing
Change the grip from eastern forehand to eastern backhand as the racket is brought to
the backhand position
Transfer the weight from the back to the front foot as the racket moves from backswing
to contact point to follow through
Hit the ball out in front of your left leg (opposite for lefties)
Use a strong follow through across the midline of your body
Keep a full synchronized sequence to the timing of the stroke
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KEY CONCEPTS �TWO HANDED BACKHAND
Move into position quickly and take your racket well back in preparation
Make sure you change to a two handed backhand grip and keep your hands snug to
each other on the grip
Keep your arms close to your body throughout the stroke
Hit the ball out in front of your right leg
Use a strong follow through past the midline of your body and over your right shoulder
Swing from low to high as you hit the ball to provide a little topspin
Keep your balance, and your follow through position for a split second and then recover
fast
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KEY CONCEPTS � BASIC SERVE
The serve is the stroke that puts the ball in play and is the most important stroke in the
game
The server is allowed two attempts (plus any let serves) to get the ball into play by
serving into the proper court
The server begins each game from the right of the center mark and serves to the
diagonally opposite right service court
The second point is started from the left of the center mark, and the server serves to the
receiver's left service court, and so on, alternating service courts until the game is
finished
There are two grips for the serve, the standard Eastern forehand grip and the
Continental grip which should be used as soon as possible
Put your left foot about an inch behind the baseline and 1 or 2 feet to the right of the
center line at a 45 degree angle (this angle varies with some players) so that your toes
point toward the net post on the right
The ball is placed (not thrown) in the air with the heel of the hand facing up, extending
the arm and hand ending in full extension forward of the right shoulder with little or no
spin
If the toss were allowed to drop, it would land in the court approximately eighteen
inches in front of the right shoulder
Make the toss higher than the racket can reach and time the toss with the take back of
the racket (answer the phone)
Coil the body by arching the back and bending your knees during preparation
Bring the racket up through the ball with an explosive forward motion
As the ball starts down, the weight shifts forward, the shoulders and trunk rotate
forward, the wrist and elbow "snap" the racket head upward and forward contacting
the ball with the body, arm, and racket at full extension (high five the giant)
Let your weight transfer carry your body and racket forward in the direction of the ball,
with your back foot coming forward to regain balance (put the sword away)
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KEY CONCEPTS - RETURN OF SERVE
The return of serve is probably the least practiced stroke and one of the most important
The return of serve is a groundstroke, forehand or backhand
Watch the ball off the server's racket and try to anticipate the location and speed of the
serve
Get the racket back early
Be aggressive and step into the ball at contact
Use a compact swing with a short backswing and follow-through
Hit deep on all returns if possible
Focus on getting the ball in play
KEY CONCEPTS � THE VOLLEY
The volley is a stroke used to hit the ball after it clears the net and before it contacts the
ground
Eastern grips are preferable for most beginners, while the Continental grip is used by
many advanced players
There is little or no backswing in most volleys
Keep the backswing and follow through brief
Punch the ball, don't swing at it
Keep the racket above the hand throughout the stroke
Step into the ball if time allows
Make contact in front your body
Maintain control of the racket with a firm grip and firm wrist throughout the stroke
KEY CONCEPTS � THE LOB
Hit the lob high and deep
An offensive lob is used to force your opponent back to the baseline into a weaker
position, a good way to stop a net rusher
It is usually hit from inside the baseline at a lower trajectory than a defensive lob
A defensive lob is used to help a player get out of trouble, usually hit from deep in the
court, it has a high trajectory and is aimed deep in your opponents court to give you
more time to recover for the next shot
The lob is started the same way as the groundstrokes, whether on the backhand or
forehand side
Make your follow through high
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KEY CONCEPTS - THE OVERHEAD SMASH
The answer to the lob is the overhead smash
The forehand overhead is similar to the service motion
The grip is the same as that used for the serve (Eastern forehand or Continental)
As soon as you determine the return is a lob, turn your body sideways to the net and get
your racket back and you non racket hand pointing to the incoming ball
Make certain the ball remains in front of you
When hitting the ball rotate your shoulders forward, extending your arm, and snapping
the racket head through the ball
After contact continue your follow through the same way you would for your serve
Let the ball bounce when it is lobbed extremely high
KEY CONCEPTS � SINGLES STRATEGY
Keep the ball in play, don't beat yourself
Concentrate on steadiness, accuracy and consistency
Keep your shots down the middle and deep and you opponent behind the baseline
Play percentage tennis and hit "safe" shots
Remember more shots are lost on errors than won on placements
Change the pace and keep your opponent off balance and guessing
Vary the speed, the spin and the placement of your shots
Effective placement of the serve requires hitting down the center, wide or directly at
the receivers body using both pace and spin
Return of serve should be deep and back in line with the servers position
Do not change a winning game strategy, always change a losing one
KEY CONCEPTS � DOUBLES STRATEGY
Each player has less court to defend in doubles
Players can attack more, which makes doubles play much more aggressive than singles
You go after your opponents by playing the net
A two back doubles formation is a defensive alignment that positions players behind the
baseline
A one up and one back formation can be used however it is vulnerable to leaving
gaping openings on the court
A two up doubles team provides the most effective offensive alignment in doubles
The "I" formation is sometimes used when an opponents has a great cross court return
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In the "I" formation the net person straddles the center line of the service box and stays
as low as possible
Poaching, is an advanced technique in which the net player moves diagonally forward
to cross in front of your partner to "steal" a ball that would normally have been played
by your partner
Getting your first serve in is critical in doubles, substitute pace for placement
Return of serve requires hitting at the feet of the net player or the in rushing server,
passing the net player, lobbing the net player or hitting cross court angled toward the
server
The key to successful doubles is gaining control of the net
All good doubles teams communicate between games, between points, and even during
points
KEY CONCEPTS � TENNIS ETIQUETTE/ UNWRITTEN RULES
Tennis has a tradition of sportsmanship
To start the game spin the racket (like heads or tails) and the winner gets his or her
choice of whether or not to serve or which side of the court to defend
When you are the server, always begin a point with at least two balls in your possession
The server must call the score (his/her score first) before the first serve
Tennis players are expected to make all the calls on their side of the court only
If the ball is "out" say out and point your index finger up in the air
If the ball is "good," just keep playing it, or if it is not playable say "good" or give a hand
signal by placing the palm of your hand down
If the ball hits a line it is good
If a ball from another court enters your court in such a manner that your play was
interfered with then play a let(a play over)
A serve that hits the top of the net but is otherwise good is reserved (let)
The order of service is a simple alternation of serves after each game is played
Players change sides of the court on uneven total number of games (1,3,5,7,)
KEY CONCEPTS � SCORING
A tennis match is played in a sequence of points, games, sets and matches
Tennis has its own peculiar scoring system
There are at least four points in a game, at least 6 games in a set, and 3 to 5 sets in a
tennis match
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There are a minimum of four points in a game, and the winner must win by two points
To win a set, you must win at least 6 games and the winner must win by two games
The game score is called in large numbers (15,30,40), while the set score is in low
numbers (1,2,3,)
When a player has not scored a point in a game his or her score is called love
The servers score is called first. The first point in a game is called 15, which is sometimes
abbreviated as 5. The second point is called 30. The third point is called 40. If the score
is tied at 40 or any point thereafter, it is called deuce. When a player has scored one
point after a deuce score, it is his or her advantage. This is sometimes shortened to ad
in or ad out. A score of ad in means that the advantage is with the server and ad out
means the advantage is with the receiver.
If the server has two points and the receiver has one, the game score would be 30-15. If
it is tied at 30, it is called 30all. If the server wins the next point the score is 40-30. If the
receiver evens it up the score is deuce. The game will continue with ad ins, deuces and
add outs until one person with the advantage wins another point and it is game.
To win a game, you must have won four points, and you must be at least two points
ahead of your opponent. To win a set, you must have won six games and be at least two
games ahead of your opponent. Thus you have not won the set if the score is 6-5. If you
win the next game, you win the set 7-5, but if you lose the next game and the score
becomes 6 all, the 12 point tie breaker must be played.
In the best of three set matches you need to win just two sets (6-4, 7-5) to win the
match
A set score of 6-6 requires a 12 point tiebreaker. A tiebreaker is played to 7 points with a
winning margin of 2 points. If it is your turn to serve, you serve the 1st point from the
right side of the court. Your opponent serves points 2 and 3 from the left court and right
court respectively; you serve point 4 from the left court and point 5 from the right court.
Your opponent serves point 6 from the left court. Players then change ends and your
opponent serves point 7 from the right court. This pattern is followed until one player
goes ahead by two points with at least 7 points scored, thus ending the set. The score of
the set is recorded as 7 games to 6 (7-6).
Game point 40-30
Break point 30-40
Set point 5-4, 40-30
Match point 7-5, 5-3, 40-30
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