Originally posted by
stormholloway:
You need to prepare earlier. You can't muscle the ball. Make sure when you're striking the ball that the energy is in the raquet head and not in your arm.
Start slowly and eventually you'll have found your rhythm and timing. The K90 is so solid from the baseline if you have your timing down.
This bears repeating, as this advice is everything you need to know in a nutshell. The K90 is not necessarily an easy racquet to play with because of its mass. If you are willing to let that mass do most of your work for you, the K90 will reward good technique, concentration, and smoothness of motion.
Smooth is fast. If you try to muscle the stick to get speed, you are going to end up fighting all that mass. You have to be physically relaxed, but mentally alert.
I've had some memorable long rallies with my oldest son, using the K90, and it isn't even my main stick (although I do go back quite a ways with the PS85 and generally heavy, stiff racquets).
The K90 isn't for everyone; no one racquet can make that claim. While I like to hit occasionally with almost any of the prostaff family, they are demanding racquets, and a lessening of concentration, endurance, preparation, or patience can quickly lead to frustration. I opt to use a slightly more forgiving stick, the Yonex RDiS 100 Mid, for regular play.
The K90 is a great racquet in many respects. You shouldn't shy away from it because of a few bad experiences. On the other hand, you shouldn't feel any reluctance to walk away from it if you find something that suits you or your game better. Plenty to choose from out there and the field just keeps getting bigger.
Keep practicing and improvement will come. Good Luck!