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They are between flat/topspin and slice swing directions.where the swing direction for kick/twist serve in that diagram?
can you draw it in?
I hit a kick, topspin and flat serve on the same toss laterally. For the flat serve, the toss moves forward a few inches and that's it. For the slice, the toss is in the same spot as the flat, but the swing path is different.The toss is key...get the ball arching back over your head. During your squat down motion push your hip out and when stroking across the back of the ball think of it like a clock face and hit from the 8 to the 2.
I see many people hitting "what they feel is their kick serve" yet they toss it in the same spot as their flat serve...so all they really hit is a slice serve.
like in this video at 1:24 if his toss came down with out it hitting the ball it would land on his forehead.
http://www.youtube.com/watch?v=S3H-ipLybRs
they way I view it is I make a toss that comes toward my face on it's downward path and my reflex is to swat it away before it hits me. That and I have a really good view of the edge of the racquet brushing up the side of the ball...so much I can normally spot a nice little puff of fuzz (on newer balls) just as I pronate thru the ball.
I hit a kick, topspin and flat serve on the same toss laterally. For the flat serve, the toss moves forward a few inches and that's it. For the slice, the toss is in the same spot as the flat, but the swing path is different.
#46 doesn't look like a kick serve - are already very extended. From that position, I can't see how he could hit 'up' enough through contact, to make it kick.
Here are two examples of the idealized tennis serve: topspin and slice. Everything between them would be some kind of kick serve.Your diagrams are two dimensional.
A twist serve adds the 3rd dimension, the UPWARDS part of the swing, to the equation.
I think this is obvious. The slice serve usually creates larger sidespin than kick serve. On condition that in both cases the speed of the ball is the same, the ball curves to the left more. So, to compensate the Magnus effect we should swing more to the right. Just change direction of the Target Plane.Toly are you saying slice serves have more of a swing out wide than kick serves? I don't see that.
Here are two examples of the idealized tennis serve: topspin and slice. Everything between them would be some kind of kick serve.
So, type of the serve is mostly defined by wrist ulnar deviation and arm orientation during impact. :shock:
You didnt address my post #66 where I posted vids of slice vs kick. No comment on that?
IMO top-slice serve = kick serve.Hey toly no way kick and slice serves have same amount of out-wide action. In the kick serve, the hand also finishes much more wider out, let alone the swing is also more parallelish to the baseline.
Are you confusing top-slice serve with kick serve?
That serve is not a flat serve. :???: It's a slice serve motion and it does curve to the left. And then it also curves after it bounces. It's just not a huge curve.Originally Posted by Toly
The ball doesn't curve to the left. He just strikes flat serve into left corner of the box.
Originally Posted by Toly
There is also the wrist ulnar deviation, which rotates the racquet in plane perpendicular to target plane. If the wrist ulnar deviation is very fast, it forces the arm to change its direction and move toward side fence.
Her elbow brakes and due to the inertia the racquet starts rotating very fast by using wrist ulnar deviation.
That serve is not a flat serve. :???: It's a slice serve motion and it does curve to the left. And then it also curves after it bounces. It's just not a huge curve.
According to you ulnar deviation forces the arm to change direction and move toward the side fence. :-?
Do you see Serena's arm moving to the side fence on her slice here that has a huge curve? I don't. http://www.youtube.com/watch?v=AshpV0lddGo&t=12s
Can you prove that this serve is slice serve? If you disagree with my explanation about the man in red shirt flat/slice serve, just tell me what is wrong with it.
We were talking about slice serve into right corner of ad box, see diagram in post #51.
Should a sequential be posted of a twist serve, one that rightie's kick from left to right after the bounce?
Why are we posting flat/slice serves here?
Agree.
maybe a frame by frame one. Not a fake modified one where Toly puts the arms wherever he wants.
There are pictures of Stosur kick serve around impact process.looks good to me. you should include contact point on the ball.
The ball’s speed and direction are mostly defined by internal shoulder rotation (ISR - arm pronation), which absolutely has nothing to do with “swinging towards the side-fence” or whatever. One can swing to the left, but if he over pronate then the ball flies to the right.i guess we can forget about contact. good pictures tho.
i think the ball contact point was more important than the string contact area because for a twist the contact is not the back of the ball. or shouldn't be anyway. it's the 'inside of the ball'. the lower left side of the ball.
because to hit that area of the ball you have to be 'swinging towards the sidefence.'