Everyball's Sophia Mezzone demonstrates her killer forehand in training yesterday. Notice how she sets up with great load through the legs and upper body turn/coil, ready to explode into the shot.
'In groundstrokes, the back leg and hip, to a greater (square stance) or lesser (open stance) degree, are the first part of the kinetic chain. They begin trunk rotation and drive the trunk upward and forward. This enables the trunk and then the arm to build racket speed...The trunk of the body links the legs and the racket arm, and has an important role to play in transferring energy from the slower-moving yet large legs to the faster-moving yet smaller upper limbs.' (Elliott/Reid from 'Tennis Science')
Rotation as we know is key to developing power, but notice also how well Sophia combines her body segments and uses the forward movement of her hitting shoulder through impact. Her head also stays beautifully still providing great stability through the shot.
Great work Sophia in learning to bring more control to your fearsome forehand!