Serve advice 2 years later

[tdent]

I got some good advice 2 years ago,
http://tt.tennis-warehouse.com/showthread.php?t=234424

Here is my serve now,
http://www.youtube.com/watch?v=mMMTg1RAzPU

I would appreciate any advice. I am having trouble jumping up into the serve, my timing is bad, sometimes I jump too soon, but most times I don't get up to the ball. Any tips?
thanks,

[LeeD]

Jumping and knee bend is great for kids.
We are not kids anymore.
Instead of knee bend and explosion, work on forward movement into the court.
Toss more into the court, start more sideways to the opponent, twist into the serve like McEnroe, stomach crunch your followthru like Roddick.
More backhand grip, more sidways prep. Start your swing slow, and accelerate into the ball.
Watch vids of pros serving.

[xinunix]

You have a "K"ink in your kinetic chain. Pause your video at 4/5 sec and you can see the reverse K that your body is forming as you reach the peak of your trophy pose. This happens because your leading hip is closing down too early. The result is a disruption of your kinetic chain, much of the energy that you are building up in your leg bend ends up lost to vertical thrust rather than a fluid drive up and out into the court. To compensate you have to recreate that energy with your arm in the second part of your swing, I would guess you hit a lot of serves long or in the top of the net. To fix this, try to focus on throwing your leading hip out into the court as you go into your trophy pose. You want your body to be in more of a reverse "D" than a reverse "K". Lead with your hip, as you turn your shoulders and load your legs. This does three things, first of all it will force you to fully extend your tossing arm and keep it up (you already do this pretty well). Second it will give you better shoulder turn and a deeper bend without resorting to just bending your back. (try it out and see, put left foot in front of right and bend your hip out, your shoulders will naturally turn and your knees will bend). The third thing it does is remove the "K"ink from your kinetic chain. The reverse "D" enables you to convert that energy from your coil and knee bend and smoothly transition it into an upward and outward motion (think about trying to drive up and out at a 45 degree angle into the court) that will have you driving through the ball as you make contact which results in better pace and more spin.

[xFullCourtTenniSx]

Straighter tossing arm (or at least reach up higher after you finish the toss), change the toss to be parallel to the baseline (so you can get more shoulder rotation). Could keep your left arm up longer too. And maybe some more knee bend. Otherwise pretty solid motion.

[ManuGinobili]

Originally Posted by tdent

I would appreciate any advice. I am having trouble jumping up into the serve, my timing is bad, sometimes I jump too soon, but most times I don't get up to the ball. Any tips?

There could be 2 reasons:
- Inconsistent toss: You'll end up "chasing" the ball and making wild contact
- Inconsistent leg load or push: I had this problem a while back. Fixed it by "leading with the front hip"

If you would like to generate more power, here's a few suggestions:
- More shoulder windup
- Spring load technique by the Serve Doctor
http://www.youtube.com/watch?v=Ixx-MCC7D88