Just a quick note on this topic now I'm older and more able to see how stupid i can be (older and wiser doesn't quite fit yet) -

The correct answer is you MUST pivot.

You may have noticed in work occupational health & safety courses on manual handling they tell you to pivot if you must turn when carrying a weight rather than twisting your back because it can injure your vertibrae.

Also this type of movement is considered one of the main causes of illiopsoas strains which can be tricky little Aholes as this injury can pretend to be so many different things:

"The types of physical actions which seem to cause this condition are standing and twisting at the waist without moving the feet"

http://www.chiroweb.com/mpacms/dc/article.php?id=38131


So if you are ever in the position i was in - a coach tells you to practice twisting without pivoting he is asking you to injure yourself, he doesn't know what he's doing, in the case of the coaches who told me that they DID pivot but just didn't think they did ........... I won't go on - you get the gist of it!

Don't waste your time there!