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heartattack 03-25-2013 05:18 AM

modern forehand
 
I would like to know Why Pro players open up their finger on the non hitting arm? before our coach would just say point the ball on your non hitting arm.

Tight Lines 03-25-2013 12:25 PM

Quote:

Originally Posted by heartattack (Post 7301287)
I would like to know Why Pro players open up their finger on the non hitting arm? before our coach would just say point the ball on your non hitting arm.

No reply?? I was curious about this one too. Actually, I am more curious about the extended fingers at the end of a serve.

I do extend my fingers during a trophy position, then I fold them when I hit. Just wondering whether the open fingers at the point of impact either at serve or forehand do anything or they are just a matter of preference.

Harry

WildVolley 03-25-2013 12:37 PM

Quote:

Originally Posted by heartattack (Post 7301287)
I would like to know Why Pro players open up their finger on the non hitting arm? before our coach would just say point the ball on your non hitting arm.

I'm not sure anyone knows for certain. It certainly isn't a crucial part of hitting a modern fh. Why don't you just try doing it and see if it feels natural?

tkoziol 03-25-2013 02:08 PM

Do you have a picture? I'm not 100% sure what you are asking...

sureshs 03-25-2013 02:13 PM

What is opening up their finger mean? What finger? Only one?

heartattack 03-25-2013 02:14 PM

http://www.google.ca/imgres?imgurl=h...9QEwAA&dur=297

Tight Lines 03-25-2013 02:23 PM








TheCheese 03-25-2013 02:36 PM

The opening of the non-hitting is actually the secret to the pro's exceptional timing and power.

Opening the fingers of the left hand activates the SSC and causes an extreme increase in racket head speed.

But really, it's just because it naturally tends to happen. It doesn't do anything.

Cheetah 03-25-2013 03:09 PM

The opening of the fingers and more importantly the extension of the wrist adds tension to the forearm which facilitates a quicker or should I say more beneficial use of the pull over of the off arm. An arm with an extended wrist "wants" to be pulled across the body and will be more connected with the torso.

Try it yourself and you will notice the difference between extended and non extended

sureshs 03-25-2013 03:11 PM

There is definitely a lot of tension there. I have seen pics of pros where the fingers appear to be twisted in a grotesque manner.

user92626 03-25-2013 05:11 PM

Do rec players close the fingers after serving or letting go of the racket in the strokes?

Tonyr1967 03-26-2013 12:11 AM

Quote:

Originally Posted by user92626 (Post 7303212)
Do rec players close the fingers after serving or letting go of the racket in the strokes?

+1.


10 char

Chas Tennis 03-26-2013 06:05 AM

Relaxed & tensed muscles with the same position.
 
The fingers can have any position and the opposing muscles that move the fingers can still have a large range of equal and opposing forces. That is, the muscles can be anywhere from 'relaxed' with no activation to maximum activation and force as in an isometric exercise. [Isometric means to apply forces but not to move.] It is hard to tell in the pictures whether the muscles are relaxed or supplying forces.

Demo. Look at the Nadal picture and hold your hand how he has his. While holding the same pose completely relax all muscles. Then apply maximum forces from opposing muscles without moving as is often done during isometric exercises. You can do both with the same hand position.

I believe for the serve relaxing the muscles allows for a better stretch.

I recently read this so I'm not sure of my interpretation. I used to think of the stretch shortening cycle (SSC) as the extension of the muscle-tendon assembly to near the end of its range of motion - like stretching that muscle-tendon assembly like a rubber band. Then, if the prestretched muscle-tendon is promptly allowed to shorten during the athletic movement, it adds force. Using prestretched muscles may be naturally faster also.

However, I now believe from my interpretation of some recent research that it is not the muscle-tendon assembly that stretches - it is mostly a large protein molecule called Titin in each muscle cell (sacomere). The interesting thing is that Titin can probably chose to stretch well before the muscle-tendon assembly is near the end of its range of motion - maybe at any muscle length. ??

See Figure 7 for the proposed interaction of Titin in each muscle cell.
Regulation of muscle force in the absence of actin-myosin-based cross-bridge interaction
http://ajpcell.physiology.org/content/299/1/C14.full

See reply #5
Biomechanical References for Tennis Strokes
http://tt.tennis-warehouse.com/showthread.php?t=427364

Is an EMG signal present when the muscle shortens using only pre-stretch?
http://tt.tennis-warehouse.com/showthread.php?t=441023

Maybe if Nadal has applied a lot of muscle force to hold his hand as in the picture then the stretching characteristics of his muscles would be much different. For example, maybe his arm acts like a rigid mass, a counterweight? If relaxed it would not act the same. ? Federer's off hand looks relaxed. ?

ga tennis 03-26-2013 06:20 AM

The non hitting hand being fingers together or apart has nothing to do with the stroke. You dont pull the non hitting arm it happens naturally.

caltiger123 03-27-2013 06:49 PM

Quote:

Originally Posted by TheCheese (Post 7302679)
The opening of the non-hitting is actually the secret to the pro's exceptional timing and power.

Opening the fingers of the left hand activates the SSC and causes an extreme increase in racket head speed.

But really, it's just because it naturally tends to happen. It doesn't do anything.

^^^+1

I don't think I could have put it better myself.

heartattack 03-28-2013 08:12 AM

looking some of those pix above.. doesn't seem relax.


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