WOW, I never knew that

try this and post your results, this is some important stuff to understand and once you do it will make things more simple.

first, cocking the wrist is what makes it move up and down
cupping the wrist is a side to side motion like opening and closing a door

1. rear arm straight out in front of your chest like you are shaking someones hand, now dont move your arm but only cup the wrist as far as you can, hold that position, now uncup as far as you can

2. Rear arm straight out, in front of your chest in the shake hand position, now cock the wrist UP as high as you can , then with the wrist still cocked also cup it back, then from their uncup as far as you can

3. Rear arms straight out in front of your chest in the shake hand position, now first Cup the wrist back as far as you can, now while being cupped back cock the wrist up. now from here dont release the cock in the wrist but try and release the cup

In this drill it may be easier if you stabalize your right arm by holding the forearm with your left hand. Also, the hand should not rotate at all during this

Does this make it a little more clear?

John Redman's "Essential Of The Golf Swing" page 82-84.

He talkes about the different ways that you you can cup your wrist and refers to both radial deviation and dorsal flexion. He takes you through a similar excercise to what you describe.

To wind it up, he points out that "the comparison is important because the more your left wrist cocks, the more club-head speed you can generate."

He also describes palmar flexion, just to say "don't use it."

Oliver Heuler in "Golf Swing Basics" also covers this a bit, but not like Redman.

I will admit that my favorite book "Swing Like A Pro" is sadly lacking in any description of this.

Theo

try the drill and post the results
ps. could we stick with cup and cock please

In my day you used to wear a cup to protect your...

Clearly I need to improve my reading skills 'coz I haven't got a clue what you've said.

Is there an English version anywhere?

Well I did the 1,2 and 3 and not quite sure what I'm supposed to be getting. I notice 3 leaves my palm facing the ground and 1 and 2 seem to be simular in having my palm facing me. I'm not very smart though

I reworded it, is it clearer now?

Ah, yeah - now I'm with you and what you're trying to explain. We do a similar drill to show the difference between cocking & rotating.

Thanks for the English version.

I do not understand the difference between cocking and cupping the wrists, also, what role do these motions play in the swing? Sorry, I am sort of new...