So to sum almost everything up, it doesn't make a difference as to whether or not uke is held or relaxed. It just depends on what you are doing. If a joint is stretched to it's limit it should be easier to dm. Doing this should be easier while the body is relaxed since they are prone to stretching. If I got anything wrong tell me so I can understand it a little better.

And pusga, your reply made perfect sense to me.