y********o
发帖数: 2565 | 1 我在上网球课。
正手击球时，会有一个向上刷墙的动作，因此球会topspin，很好懂。
但是发球的时候，这个topspin是怎么弄出来的，我有点儿想不通。难道是在头顶击球
的时候，球拍有往正前方搓的动作？
看了一些youtube录像，亦不能释惑。 |
s***i
发帖数: 6149 | 2 www.fuzzyyellowballs.com
has some good videos, if you haven't watched them..
【在 y********o 的大作中提到】
: 我在上网球课。
: 正手击球时，会有一个向上刷墙的动作，因此球会topspin，很好懂。
: 但是发球的时候，这个topspin是怎么弄出来的，我有点儿想不通。难道是在头顶击球
: 的时候，球拍有往正前方搓的动作？
: 看了一些youtube录像，亦不能释惑。
|
K****D
发帖数: 30533 | 3 You have to learn 挠背 first.
No 挠背，hard to imagine topspin原理。
【在 y********o 的大作中提到】
: 我在上网球课。
: 正手击球时，会有一个向上刷墙的动作，因此球会topspin，很好懂。
: 但是发球的时候，这个topspin是怎么弄出来的，我有点儿想不通。难道是在头顶击球
: 的时候，球拍有往正前方搓的动作？
: 看了一些youtube录像，亦不能释惑。
|
f*********0
发帖数: 886 | 4 No, I donot agree with you.
Topspin is not related to 挠背,
挠背 is for accellrating racquet speed.
挠背 is a natural result of other correct poses.
【在 K****D 的大作中提到】
: You have to learn 挠背 first.
: No 挠背，hard to imagine topspin原理。
|
y********o
发帖数: 2565 | 5 I guess that when we hit the ball on top of hour head, we are brushing the
ball downwards, resulting in bottom-spin (I mean the opposite of topspin). Apparently this assumption isn't
correct. I wanna watch a topspin serve in slow motion.
【在 K****D 的大作中提到】
: You have to learn 挠背 first.
: No 挠背，hard to imagine topspin原理。
|
y********o
发帖数: 2565 | 6 Yes, I like the fzb videos very much.
【在 s***i 的大作中提到】
: www.fuzzyyellowballs.com
: has some good videos, if you haven't watched them..
|
y********o
发帖数: 2565 | 7 Alicia Molik:
http://www.youtube.com/watch?v=hV1iVOc0-eI
Guessing: The moment her racket contacts the ball, a tiny little horizontal
forward motion of the racket generates the topspin.
Apparently this assumption isn't
【在 y********o 的大作中提到】
: I guess that when we hit the ball on top of hour head, we are brushing the
: ball downwards, resulting in bottom-spin (I mean the opposite of topspin). Apparently this assumption isn't
: correct. I wanna watch a topspin serve in slow motion.
|
s*****e
发帖数: 248 | 8 The key of topspin serve is exactly to brush the ball upwards. To do that
you need to toss the ball a bit lower and over your head, then your racquet
can come from behind and from low to high.
Apparently this assumption isn't
【在 y********o 的大作中提到】
: I guess that when we hit the ball on top of hour head, we are brushing the
: ball downwards, resulting in bottom-spin (I mean the opposite of topspin). Apparently this assumption isn't
: correct. I wanna watch a topspin serve in slow motion.
|
f*********0
发帖数: 886 | |
y********o
发帖数: 2565 | 10 Cool, you confirmed that my intuition is probably correct. Although I
thought it is forward, but really it is upwards. That makes perfect physics
sense. Not easy.
racquet
【在 s*****e 的大作中提到】
: The key of topspin serve is exactly to brush the ball upwards. To do that
: you need to toss the ball a bit lower and over your head, then your racquet
: can come from behind and from low to high.
:
: Apparently this assumption isn't
|
|
|
K****D
发帖数: 30533 | 11 I was gonna give the same video.
It clearly shows the relationship between 挠背 and topspin.
挠背 --> racket head goes from down to up --> topspin
【在 f*********0 的大作中提到】
: http://www.youtube.com/watch?v=iRaONZgUg-k
: 这个系列蛮好的。 一步步来 。
: 但是说得容易做的难。 这就是网球 。
|
y********o
发帖数: 2565 | 12 Thanks. Perfect drill. Much better than watching a real serve in slow motion
like that of Alicia Molik.
It seems to be pretty clear now: You gotta brush upwards to get a topspin
just like a forehand hit.
【在 f*********0 的大作中提到】
: http://www.youtube.com/watch?v=iRaONZgUg-k
: 这个系列蛮好的。 一步步来 。
: 但是说得容易做的难。 这就是网球 。
|
f*********0
发帖数: 886 | 13 hehe, even flat first serve still has 挠背 ah.
It is the contact point not 挠背 what make the difference.
【在 K****D 的大作中提到】
: I was gonna give the same video.
: It clearly shows the relationship between 挠背 and topspin.
: 挠背 --> racket head goes from down to up --> topspin
|
K****D
发帖数: 30533 | 14 en, that makes sense too.
But if no 挠背 at all, it's really hard to do a topspin, no matter
how you twist the angle of the racket. Brushing the top of the ball
forward is almost physically impossible.
【在 f*********0 的大作中提到】
: hehe, even flat first serve still has 挠背 ah.
: It is the contact point not 挠背 what make the difference.
|
y********o
发帖数: 2565 | 15 从挠背开始，球拍先是做砍人状，通过pronation, 逐渐变成拍苍蝇状，直到拍到苍蝇
。是不是这样？
【在 K****D 的大作中提到】
: en, that makes sense too.
: But if no 挠背 at all, it's really hard to do a topspin, no matter
: how you twist the angle of the racket. Brushing the top of the ball
: forward is almost physically impossible.
|
K****D
发帖数: 30533 | 16 Don't intentionally pronate on 2nd serves.
The more you pronate, the less spin you get.
【在 y********o 的大作中提到】
: 从挠背开始，球拍先是做砍人状，通过pronation, 逐渐变成拍苍蝇状，直到拍到苍蝇
: 。是不是这样？
|
f*********0
发帖数: 886 | 17 Lol, 砍人 -> 拍苍蝇 -> 拍到苍蝇
You could make a tutorial for beginner.
haha.
【在 y********o 的大作中提到】
: 从挠背开始，球拍先是做砍人状，通过pronation, 逐渐变成拍苍蝇状，直到拍到苍蝇
: 。是不是这样？
|
N*****7
发帖数: 1899 | 18 Not 拍苍蝇状, as 苍蝇拍 is forehand-grip, semi-western. Serve grip
is continental, or single-handed backhand.
The differece is there is no 90 degree body turn when 拍苍蝇, unless it is a
BIG 苍蝇.
【在 y********o 的大作中提到】
: 从挠背开始，球拍先是做砍人状，通过pronation, 逐渐变成拍苍蝇状，直到拍到苍蝇
: 。是不是这样？
|
K****D
发帖数: 30533 | 19 He said "using pronation to 拍苍蝇", so he didn't deny the
continental grip (砍人 grip).
Pronation is needed for 1st serves.
a
【在 N*****7 的大作中提到】
: Not 拍苍蝇状, as 苍蝇拍 is forehand-grip, semi-western. Serve grip
: is continental, or single-handed backhand.
: The differece is there is no 90 degree body turn when 拍苍蝇, unless it is a
: BIG 苍蝇.
|
y********o
发帖数: 2565 | 20 比较好理解，是吧？
【在 f*********0 的大作中提到】
: Lol, 砍人 -> 拍苍蝇 -> 拍到苍蝇
: You could make a tutorial for beginner.
: haha.
|
|
|
y********o
发帖数: 2565 | 21 对，跟拍苍蝇不完全一样，因为拍苍蝇没有upward brush, 不可能产生topspin。
a
【在 N*****7 的大作中提到】
: Not 拍苍蝇状, as 苍蝇拍 is forehand-grip, semi-western. Serve grip
: is continental, or single-handed backhand.
: The differece is there is no 90 degree body turn when 拍苍蝇, unless it is a
: BIG 苍蝇.
|
K****D
发帖数: 30533 | 22 topspin拍苍蝇法只适合拍飞行中的苍蝇。
【在 y********o 的大作中提到】
: 对，跟拍苍蝇不完全一样，因为拍苍蝇没有upward brush, 不可能产生topspin。
:
: a
|
b*****t
发帖数: 758 | 23 Simple way to get topspin in serve: throw the ball 2-3 inches BEHIND your
head and then try to serve. I guarantee you will get topspin although you
may not know where the ball end up with at the beginning.
【在 y********o 的大作中提到】
: 我在上网球课。
: 正手击球时，会有一个向上刷墙的动作，因此球会topspin，很好懂。
: 但是发球的时候，这个topspin是怎么弄出来的，我有点儿想不通。难道是在头顶击球
: 的时候，球拍有往正前方搓的动作？
: 看了一些youtube录像，亦不能释惑。
|
y********o
发帖数: 2565 | 24 可不可以不要pronation,从挠背开始就做拍苍蝇状？
【在 K****D 的大作中提到】
: Don't intentionally pronate on 2nd serves.
: The more you pronate, the less spin you get.
|
