Pronation is a special type of arm movement that allows you to accelerate your tennis racket through the ball, increasing the amount of power and spin you can ...
The easiest way to understand and feel this motion is to turn your palm upwards, towards the sky. In this position your forearm and hand are now supinated ( ...
If you learn the flat serve first, you immediately start programming your forearm to pronate early. You'll have difficulties learning spin and slice serves. 3.