ByeByePoly
Talk Tennis Guru
I posted this so @Curious didn't have to. 
I will stick with 2hbhs, but ....
Ah ha fh shadow swing moment. I promised myself I would not talk about FHs in 2018. That went well.
Tell me if this matches the sequence of what you "hippy FH players" are doing on your FH:
(Assume open stance FH hitting off back leg)
1) hip turned past feet, shoulders turned past hips
2) forward swing starts with back leg/hip drive
- when this happens your upper body (torso,shoulders,arm,hand) rotates together over the back leg hip joint
- at this point none/little core/torso/shoulder/arm firing
3) after "some" upper body uncoiling, the core/shoulder/arm (arm extending for Fed) firing happens. My guess is this happens around the point where the hip uncoiling ends, and then we fire the upper body (this is probably the throwing motion point Pete and others mention).
So to me, there is no delay in torso/shoulder rotation after hip rotation. There is a delay of "some torso rotation" before the upper body fires. This makes sense because shoulders continue to turn after hip rotation has ended. Just taking a glance at Fed FHs, the shoulder turn (uncoiling) doesn't have a long run past hips until it pauses (temporarily) and the arm continues, but it's there.
This was what I was trying to tell @Pete Player in another thread. I called it stages of resistance:
1) hip uncoiling completes and passes momentum to shoulder turn
2) shoulder uncoiling completes/pauses (shoulder turn will start up again to allow for remaining follow through) and passes momentum to arm
3) arm reaches extension point where hand turns left, and momentum is passed on to racquet rotating around hand.
I will stick with 2hbhs, but ....
Ah ha fh shadow swing moment. I promised myself I would not talk about FHs in 2018. That went well.
Tell me if this matches the sequence of what you "hippy FH players" are doing on your FH:
(Assume open stance FH hitting off back leg)
1) hip turned past feet, shoulders turned past hips
2) forward swing starts with back leg/hip drive
- when this happens your upper body (torso,shoulders,arm,hand) rotates together over the back leg hip joint
- at this point none/little core/torso/shoulder/arm firing
3) after "some" upper body uncoiling, the core/shoulder/arm (arm extending for Fed) firing happens. My guess is this happens around the point where the hip uncoiling ends, and then we fire the upper body (this is probably the throwing motion point Pete and others mention).
So to me, there is no delay in torso/shoulder rotation after hip rotation. There is a delay of "some torso rotation" before the upper body fires. This makes sense because shoulders continue to turn after hip rotation has ended. Just taking a glance at Fed FHs, the shoulder turn (uncoiling) doesn't have a long run past hips until it pauses (temporarily) and the arm continues, but it's there.
This was what I was trying to tell @Pete Player in another thread. I called it stages of resistance:
1) hip uncoiling completes and passes momentum to shoulder turn
2) shoulder uncoiling completes/pauses (shoulder turn will start up again to allow for remaining follow through) and passes momentum to arm
3) arm reaches extension point where hand turns left, and momentum is passed on to racquet rotating around hand.