Nothing specific. Just trying to say that a certain playing style for a certain player might gel better with light vs heavy.what kind of playing style are you talking about? baseline basher? pusher? serve and volley? moonballer?
Not just that, but nobody ever talks about body types. For example, I have long skinny arms and I hold my racket with my hand partially hanging off the end of the butt cap. Simple physics would tell you that the stress on my elbow and shoulder would be much higher than for somebody with shorter arms that chokes up on the grip.
My point is... there are so many variables involved and everybody is different... so to make a blanket statement that heavy rackets are better for EVERY player's arm is total nonsense.