At any rate, my hand position looks like Segovia's, and I play on the opposite side of the fingers from most players, and I experience no discomfort. You have to reposition the right forearm first. The main idea I was trying to convey is that the apparent sideways bending of the wrist is sort of an optical illusion, if you will, caused by the anatomy of the hand. Let your wrist go limp. It's also true.
Repetitive movement can cause tendonitis or carpal tunnel syndrome.
The carpal tunnel is a narrow tunnel in the wrist through which the tendons must move in order to control the movements of the fingers. A bent or deviated wrist causes the tendons to crowd one side of the tunnel. This restriction can cause tendonitis through repetitive movement. Muscles move best when aligned with the joints they control. After all, a train moving at 100 mph can appear motionless if it is headed straight for you.