In interesting point has risen here. Which is can older stiffer people manage the use of the hips. Or the body position in that elusive ghastly CBMP. We have double trouble here. To tell a person to use exercise to get more mobile, some could finish getting back troubles. Yet on the floor an adjudicator will not look twice at a couple who are only half performing. I suppose a clever teacher might find a way around this. Some do in Latin where the choreography is designed to hide the faults. In many cases this is just a Rumba walk. They don't do any, spending a minute and a half going from one shape to another completely devoid of any movement of the hips. On with the Motley.

Hi luvlatin
You mentioned judges in your comment, so i guess you're referring to aspiring competitve dancers. you're right in saying that exercises to improve mobility of the trunk (turning etc) can be a problem for the back. However, competitive dancers have presumably been dancing to some level for a few years, and this might give them reasonable mobility to start from. I would recommend getting advice from a good physiotherapist. I'm blessed with very good flexibilty, but on the odd occasion have injured my back (doing other things) and have found to my delight that dancing, with its combination of movement and good posture, has considerably helped my recovery. So i would imagine that with some care, and being certain of maintaining good posture at all times, it must be possible to improve mobility safely. Also, remember that strong abdominal muscles are a pre-requisite for good back care.