Absprung beim Aufschlag

[african tiger]

hallo again,
some people jump into the air while they serve, some dont. does any one form you/us have experience with those jumping serves? does it help in any way? answers in german welcome.

[A.Roddick]

Beim aufschlag springt so ziemlich jeder Profi hoch. Liegt ganz einfach daran das du den Ball am hoechsten Punkt treffen willst. Um ihn genau da zu treffen, kommst du aus den knien und springst ganz einfach ab und hast mehr power!

Also abspringen is definitiv besser als ein aufm boden zu bleiben!

[eumel]

das abspringen ist einer der wichtigsten Teile der Aufschlagbewegung, da ein großer teil der beschleunigung des balles aus den Beinen kommt.

[african tiger]

OK, the verdict is clear: jump
i honestly speaking did try it but have never managed to synchnonize the movements with the jump (it´s difficult enough without jumping). now: the trick may lie in the fact, that one should not deliberately jump. that´s what my african instructor keeps saying. but how can one jump without wanting or intending to jump? (folk, that´s not a question of some philosophical theories of action , but how has one of you got it at tennis serve?)
thank so much for answers

[Hawkeye2]

@africantiger

Hi,

when serving your aim is not to jump but to get the tip of your racket head as fast as possible.

To do this you must activate all of the power sources you have.

One of the best power sources is mother earth, according to Newtons Third Law of Motion...

When you bend your knees for your service motion, your body exerts a downward force on the earth and the earth exerts an upward force on your body.

And comparing your weight to the weight of mother earth, there is no limit to the possible upward force of the earth itself...

Meaning:

if you push downward against the ground, there will be an opposite force in the upward direction, helping you to accelerate into the tossed ball.

But your aim is not to jump into the air but to accelerate the racket head as fast as possible.

By concentrating on this acceleration your body will automatically lift from the ground.

If you deliberately jump into the air, your movement energy is exhausted when you leave the ground because this would be your aim.

But you hit the ball after you leave the ground so you need all of your movement energy a little bit later, that's the trick.

Good Luck

Bye

[african tiger]

hi folk, hi hawkeye2

i´ve been told again and again, that the knees have to work/bend extremely at those jumping serve. now i would try that anh the accelaration of the racket head you recommended. and important: not trying to jump intentionally (is that right?) let see whether i will get my feet automatically off the ground. your explanation is superb, like always. thanks.

[Hawkeye2]

@african tiger

Hi,

of course you won't lift yourself from the ground when you keep bending your knees during the service motion.

You start your service motion (after bending your knees and taking the racket back by turning your shoulders) by pushing yourself up gainst the tossed ball.

The beginning upward motion should help your racket to drop behind your back. At the same time you rotate your shoulder as fast as possible and your racket accelerates up against the ball.

This whole upward motion will surely get your feet off the ground, but it is not an intentional jump in the air.

Off course, coordination of all these factors is the major problem.

I.e. if your legs have finished "pushing" against the ground before you turn your shoulders you will not benefit from the power of your leg drive. This is what usually happens when you intentionally jump into the air.

Tape the Pro's (Federers Serve is not the fastest but as all other strokes technically perfect) and watch the Service in Slow Motion again and again.

Bye

[african tiger]

yahoo! i think i got it, getting a bit off the ground!
posted 2 video on youtube. sorry for the poor quality (was in zanzibar and some body took it with my china-built-southafrican-blackmarket-cheap-cellphone.
gratefull for your comments again. what i can see it, that i may habe tossed the ball too far to the center. it should habe been more to the right for a serve, supposed to be a topspin slice one, should´n it?
thank you folk

http://www.youtube.com/watch?v=GW-F_dmvAug

http://www.youtube.com/watch?v=EOkokAeTiOo

[Hawkeye2]

@african tiger

Hi,

it's difficult to see the toss in those videos.

Judging from your service motion the toss seems to be ok, the motion is fluid so you don't seem to have to compensate for a bad toss.

You could add a little speed by paying more attention to your right hip.

Before accelerating your shoulder into the ball don't forget to turn your hip just as fast.

In the videos it looks as if your hip turn lacks a little "energy".

Bye

[Benedikt]

Sorry mein Englisch ist ziemlich unterbelichtet, also in deutsch. Der Absprung beim Aufschlag ist wichtig weil:

- Sich die Dynamik des Sprungs auf den Ball geht

- Da die Beine in der Luft sind, gibt es keine Probleme mit dem Gleichgewicht

- Der Sprung kann als zusätzliches Steuerungsmittel eingesetzt werden, den da wo man hinspringt, geht auch der Ball hin.

- Durch den Sprung wird besonders der Twistaufschlag effektiver, da die Dynamik des Sprungs den Drall unterstützt

[Endy]

Jap, aus der Bewegung an sich ist auch gar nichts anderes möglich als der Absprung bei voller Dynamik. Liegt also nicht unbedingt nur am höheren Treffpunkt, sondern der mindestens leichte Sprung ergibt sich schon aus der Bewegung.

Muss man nicht unbedingt lernen, wenn es von Klein auf ohne Sprung gelernt wurde kann man das schon lassen.

[african tiger]

allright allright, you are right, I negleted the hip because of the concentration on the jump. Some body posted on his web site (called revolutionary tennis), that one should concentrate on the stomach what I did und the hip was out .
Now at the weekend, I paid attention to the hip again and, You guess it, i was not off the ground: the jump suffered.
The trick is now hip/shoulder for speed without neglegting the jump and other way round. Is there any thing to pay attention to or is this just a question of drill? The jump tendency is definitely there as Endy said.
So long
Cheers
Tiger