Increasing dwell time

Discussion in 'Tennis Tips/Instruction' started by dknotty, Aug 26, 2013.

  1. dknotty

    dknotty Semi-Pro

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    So how does one increase the dwell time of the ball on the strings?

    Are there techniques for this?
     
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  2. PhrygianDominant

    PhrygianDominant Hall of Fame

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    I don't think you can swing differently to increase it. The time the ball is actually on the strings is measured in only a few (4-7?) milliseconds, so there isn't much room either way.

    Lowering your tension and playing with a more flexible racquet can increase what a lot of players call pocketing or cradling, but if the ball actually stays longer on the strings by any measurably significant degree is hard to say. The feedback at contact for the player is probably percieved to change quite a bit, but the actual length of contact is probably not.

    This is my understanding of it, however others who are more informed than me will probably post.

    EDIT: by the way, how are you liking the yonex? what were you playing before? I am playing it at around that tension right now.
     
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  3. dknotty

    dknotty Semi-Pro

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    Had a session with a guy yesterday who made some suggestions on my forehand, the upshot being that the ideal stroke is that your shoulder is moving until the racket contacts the ball, then the wrist takes over until the ball leaves the racket then the shoulder comes back into play for the follow through. Very interesting indeed and quite hard to put into practice given the tiny small dwell time.

    Loving the yonex! There the most comfortable strings I've played with by a long shot (no pun intended). Durability is pretty good as well! Will be trying the 1.20 next.

    How are you finding the strings?
     
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  4. PhrygianDominant

    PhrygianDominant Hall of Fame

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    I don't have a very good barometer because I just haven't tried that many strings. I previously was using SPPP 1.18, the only poly I have hit with any regularity. I know the gauges aren't really similar, but I volley MUCH better with the yonex. That was always my main complaint with a lot of poly strings, and the yonex has a lot of touch for a poly. I don't think I will even try the thinner gauge when it becomes available, I will just stick with this one.
     
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  5. Pet

    Pet Semi-Pro

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    Yes, its call ... jumpulse :)
     
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  6. 2ndServe

    2ndServe Professional

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    I think the key is keeping the racket angle consistent through the hitting zone and follow through.
     
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  7. Topspin Shot

    Topspin Shot Legend

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    In short, no.
     
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  8. newpball

    newpball Legend

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    One cannot change the dwell time by changing technique.

    Strings have an influence on dwell time, gut has the longest while poly has the shortest dwell time for balls also tension is a factor, lower tension is longer dwell time.
     
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  9. sureshs

    sureshs Bionic Poster

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    Dwell time is in the range 1 - 5 ms and depends on tension and string, and perhaps flex of frame as well.
     
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  10. sureshs

    sureshs Bionic Poster

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    I have a theory that a more closed face during topspin can increase the dwell time, but I am not sure.
     
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  11. newpball

    newpball Legend

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    I thought it was a little bit longer, more like 4-8 ms.
     
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  12. TennisCJC

    TennisCJC Legend

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    I think any brushing action increases time the ball remains in contact with strings. Best example that you can feel is a low volley. Try hitting a low volley with a square action where you just hit straight through the ball toward the target. Now, try hitting a low volley where you hit downward with an outside to inside pulling across motion. It will feel like the ball stays on the strings longer.

    Same thing with groundstrokes. A square flat groundstroke where you hit out toward the target will not have as much string contact time as one where you pull upward and across thru contact.

    Difference is small and you may already use the brushing action.

    Agree with others, flexible frame, softer strings, or lower tensions also increase dwell time.
     
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  13. jakeytennis

    jakeytennis Rookie

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    with a fast wind shield wiper motion, i feel that the ball stays on the strings longer. when i don't swing fast, i don't feel the ball on the strings as long, and i have less control
     
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  14. SystemicAnomaly

    SystemicAnomaly G.O.A.T.

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    ^^^ Typical dwell times on the stringbed are 4-5 ms according to Yandell, Cross and others. The dwell time for a ground interaction (a bounce) is typically 3-4 ms according to Rod Cross, I believe. It might be possible to increase stringbed dwell time with a touch/drop volley however, for normal strokes, the dwell time will probably not vary much at all (10% or so) regardless of how fast one swings.

    The dwell time can be increased to 7 ms or so by significantly reducing stringbed stiffness (which includes frame stiffness). Reducing string tension is one way to do this.

    http://tennis.quickfound.net/training/tennis_science.html
    http://www.tennis.com/gear/2012/05/string-theory-stringbeds-tension-and-performance/38597/#.Uhsrx2REQWU
    .
     
    Last edited: Aug 26, 2013
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  15. sureshs

    sureshs Bionic Poster

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    No, we have discussed that before with TW Prof. There may be some special cases though.
     
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  16. newpball

    newpball Legend

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    OK, I thought 1 ms seems awfully short.
     
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  17. boramiNYC

    boramiNYC Hall of Fame

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    considering many rec players have poor control of the shoulder (either erratic or consistently off the sweet spot of the shoulder range of motion) what that guy said is spot on for many. but shoulder never stops or slow down and accelerate. it's more consistently placing the arm control in the middle of the sweet spot of the shoulder range of motion. first you kinda have to understand how the shoulder moves and where the sweet spot is. and try to place the arm in that spot all the time.
     
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  18. Cheetah

    Cheetah Hall of Fame

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    dwell time = 4-8ms. not 1ms.
     
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