# Move Forward In Tennis And Don't Change A Thing

#### BallBag

##### Professional
Now what happens if they are moving forward, i.e. "transferring their weight" into the shot?

What about hitting volleys with your legs instead of swinging? These are all things where we tell our students to get their body into the shot. Some of these "such and such is a myth" threads are based on some misunderstanding of what the advice is for.
It doesn't matter if the ball is moving at 30 MPH and the racket is stationary or if the ball is stationary and the racket is moving at 30 MPH or any other combination. The experiment did not preclude attaching mass to the handle creating and effect. A stiffer racket and strings would shorten the round trip so there could be an effect. That experiment is simple enough for anyone to duplicate if you want to try different setups. I would be interested to see if the is an effect with a hard mounted handle.

#### Kevo

##### Legend

If you look at the graph and read, the conclusion is hand waved slightly. It's also apparently one racquet and string condition. In any case, the idea of weight transfer as a coaching cue or general bit of advice when learning to hit is not about whether I could hit harder if I gained weight. It's about using the mass that I have more effectively.

#### BallBag

##### Professional
If you look at the graph and read, the conclusion is hand waved slightly. It's also apparently one racquet and string condition. In any case, the idea of weight transfer as a coaching cue or general bit of advice when learning to hit is not about whether I could hit harder if I gained weight. It's about using the mass that I have more effectively.
There is no doubt that the free standing racket deflected more than the one being held. The data is showing that the effect on the ball is negligible. This is also not saying anything about "weight transfer" and its effect on the weight of the racket or apparent weight or any other quasi-scientific terminology you want to use. Those two concepts are unrelated even though they both include weight as a factor.

#### Kevo

##### Legend
It doesn't matter if the ball is moving at 30 MPH and the racket is stationary or if the ball is stationary and the racket is moving at 30 MPH or any other combination. The experiment did not preclude attaching mass to the handle creating and effect. A stiffer racket and strings would shorten the round trip so there could be an effect. That experiment is simple enough for anyone to duplicate if you want to try different setups. I would be interested to see if the is an effect with a hard mounted handle.

I don't know for sure about held vs stationary in all conditions, but clearly you can see the difference between a volleyer moving forward and not moving forward. You're adding an additional velocity. Same thing for the traditional step in closed forehand. I think it would be fascinating to see some experiments done to try and tease out if a larger person holding a racquet makes any difference to the result vs a smaller person in a wide range of equipment scenarios, but I think that's a separate issue from "weight transfer". I think that's always been about what you do with your body, not somehow transferring your weight to the object your hitting.

#### Kevo

##### Legend
There is no doubt that the free standing racket deflected more than the one being held. The data is showing that the effect on the ball is negligible. This is also not saying anything about "weight transfer" and its effect on the weight of the racket or apparent weight or any other quasi-scientific terminology you want to use. Those two concepts are unrelated even though they both include weight as a factor.

Yes, I agree. In the tested conditions the effect was negligible. I also agree that we seem to be discussing two unrelated concepts currently.

#### BallBag

##### Professional
Yes, I agree. In the tested conditions the effect was negligible. I also agree that we seem to be discussing two unrelated concepts currently.

I'm glad we can at least put that to rest.

#### curly_2350

##### Rookie
The high school physics homework is great and all, but I'm still curious about my question.

Are proponents of the move forward and add mass theory saying skin and bones lanky Rublev could usefully add power to his 100mph ground strokes by running forward each time he hits the ball, or by adding a weight vest?

#### Curious

##### G.O.A.T.
Just like the tip of the whip is connected to the opposite thicker, heavier end. If you cut of some of the heavier end of the whip, you do not get the same effect.
And the whip is faster when it’s cracked by a heavier person??

#### BallBag

##### Professional
The high school physics homework is great and all, but I'm still curious about my question.

Are proponents of the move forward and add mass theory saying skin and bones lanky Rublev could usefully add power to his 100mph ground strokes by running forward each time he hits the ball, or by adding a weight vest?

Rublev running at 10 MPH and hitting a ball vs Rublev running on a treadmill at 10 MPH and hitting ball would result in Rublev's racket moving 10 MPH faster when running on the court vs. running on the treadmill. Also, if Rublev packed on an extra 50 lb of muscle he would hit the ball harder and be one scary Russian.

#### Znak

##### Hall of Fame
By some people's logic here Dylan Alcott should have the same forehand speed as Domi Thiem.

Here's some good reading material:

#### curly_2350

##### Rookie
From a physics standpoint it's both very complicated and fairly simple depending on how much you want to go into detail. Unfortunately this is not a physics forum, we're trying to improve at the sport of tennis.

OP's original article is pretty straightforward. Hit dynamically with your whole body and learn to hit on the rise and be aggressive. That's fine. The physics squabbling has pretty much derailed the whole thread without any gain. It's like if someone made a thread on how to dunk in basketball and the thread was about whether you do pull the earth towards you when you jump.

#### fecund345

##### Rookie
From a physics standpoint it's both very complicated and fairly simple depending on how much you want to go into detail. Unfortunately this is not a physics forum, we're trying to improve at the sport of tennis.

OP's original article is pretty straightforward. Hit dynamically with your whole body and learn to hit on the rise and be aggressive. That's fine. The physics squabbling has pretty much derailed the whole thread without any gain. It's like if someone made a thread on how to dunk in basketball and the thread was about whether you do pull the earth towards you when you jump.

And I am old with back problems and a hip replacement...so I can't hit as hard or move toward it as fast

Sent from my SM-A102U using Tapatalk

W

Last edited:

#### fecund345

##### Rookie

And I am old with back problems and a hip replacement...so I can't hit as hard or move toward it as fast

Sent from my SM-A102U using Tapatalk

Sent from my SM-A102U using Tapatalk

#### fecund345

##### Rookie

Sent from my SM-A102U using Tapatalk

#### fecund345

##### Rookie
Here you go

Sent from my SM-A102U using Tapatalk

#### Povl Carstensen

##### Legend
And the whip is faster when it’s cracked by a heavier person??
In tennis the body is a part of the whip.

#### Znak

##### Hall of Fame
And the whip is faster when it’s cracked by a heavier person??
yes and no. from my link above:

(...) he calculated that if you assume a baseball player starts out with about 50% of their weight as muscle, every 10% of muscle mass he gains will translate into a roughly 3.6% to 3.9% increase in bat speed. The trouble is, if a player gets bigger—even if he is also getting stronger—he might start to move his bat through the zone more slowly. This happens because of another aspect of physics: momentum.
...
This is why it’s critical for athletes to not only increase their strength, but also their power, which is a combination of force and speed, explains Karakolis.

#### Happi

##### Hall of Fame

And I am old with back problems and a hip replacement...so I can't hit as hard or move toward it as fast

Sent from my SM-A102U using Tapatalk

I like the video from 1:19 - 2:15

Jokes aside, dropfeeding seem to work well for you.

#### fecund345

##### Rookie
I like the video from 1:19 - 2:15

Jokes aside, dropfeeding seem to work well for you.
Thanks

Sent from my SM-A102U using Tapatalk

Replies
0
Views
149
Replies
15
Views
2K
Replies
42
Views
5K
Replies
32
Views
4K
Replies
22
Views
929