Does Rolfing the structural integration technique which was developed by Ida Rolf help increase one's turnout in ballet?

The advances that have been made in our understanding of how soft tissue manipulation affects the structural and postural integration of the body and mind has grown wider in its scope than the earlier days when Rolfing was seen more as the only choice.

The more current approach to structural integration of the body and the mind follows more closely with the work of Fritz Perls, Ken Dychtwald, Wilhelm Reich, and Alexander Lowen.

To sum it all up as simply as possible, the type of massage/bodywork that will help you attain your greater range of motion for your turnout in ballet is the one that feels good to you and addresses your individual character, your unique personality. If it feels good to you when it is performed on you, then your body will understand it, will accept it; and will feel safe enough to allow the change. If the massage/bodywork does not feel good, then your body will resist and guard itself, thereby reducing your flexibility instead of enhancing it.

So my answer is: It does not matter what type of massage/bodywork you receive, whether it is Rolfing, Swedish, Thai, Acupressure, or other. What matters most is what makes your body feel good and feel happy when it is receiving it. That will get you your desired change in your turnout.