Should you focus on pronation on your flat first serve and on your kick serve?

I will break it down in today’s video lesson

After you watch this video lesson, you’ll most likely look at pronation in completely different way

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  1. bruce

    Not tennis related question. I see you have a degree in economics from Stanford. are you invested in the bitcoin craze!!?

  2. Solo Fullblod

    Hi Jeff!
    I am a customer of yours from Sweden and you do a great job! About pronation it’s important to note that we Europeans don’t learn to throw a ball at an early age like Americans do. We don’t play baseball here and that’s probably why we don’t have as many great servers as you do. Of course there are natural throwers but to me learning to pronate was a great mystery and took many years to make natural. In the beginning I didn’t have any instinct at all to pronate before hitting the ball but could have continued on edge forever. Now I am wrestling with another challenge, namely the importance of loading the hip and then to relax the arm at the same time I rotate the hip backwards. A lot of the power and the wrist snap is contained there but I don’t think I have ever seen a video pointing that out. To load the hip yes but not how loading and unloading the hip promotes the accelleration of the racket and the weight shift to the front foot. Roddick quit because he couldn’t accellerate his hips after his hip surgery.

    Best to you!

    • Jeff Salzenstein

      Thank you for your thoughtful response and share, Solo. I really appreciate it.

  3. Dan

    Well done Jeff,
    One of the best instructional videos on the kick serve with some added finer elements that I will be trying out to improve my own kick serve. I watch all the videos I can of yours and you have helped me make real gains in my 4.0+ game. Thanks again for the top notch professional help you share with all of us recreational players.

    • Jeff Salzenstein

      Dan, Thank you for your thoughtful words. I really appreciate it.

  4. bob


    I like your instruction and follow it and have learned a lot from you, but I’m sorry to have to say you’re wrong about this one! The pronation is identical in the two serves, as proven beyond doubt or question by your video.

    The difference between the two frames is in the direction your serving arm points, not in the amount of pronation. In the kick-serve frame, your serving arm points almost directly toward the camera, therefore the face of the racket is toward the back fence. In the flat serve frame, your arm is extended toward the net, therefore the face of the racket is toward the side fence.

    But in both frames, your hitting arm is parallel to the court surface and the racket is pointed straight down, vertical, perpendicular to the court surface. When your arm is parallel to the surface of the court, the only way to make the racket point straight down toward the court is to pronate. There is no other way to do that.

    It makes no difference whether your arm is pointing toward the net or toward the side fence. In both cases you have to pronate in order to get the racket pointed at the ground.

    You can try this in your living room. If you hold your arm out parallel to the ground, the only way to make the racket point toward the ground is by pronating. There is no other biologically possible way to do that.

    So I think you need to revise your commentary to the two videos. It’s the direction of the swing path that is different between the two serves, not the amount of pronation.


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