Parkinson’s Disease 

In 2002, a study was carried out assigning 93 subjects with Parkinson's Disease to receive Alexander Technique lessons, massage, or no treatment. Alexander Technique lessons (but not massage) led to significant improvement in self-assessed disability, both immediately after the lessons and six months later.
Randomized Controlled Trial of the Alexander Technique for Ideopathic Parkinson's Disease. Stallibrass C, Sissons P, Chalmers C (2002). Clinical Rehabilitation, 16(7):695-708. 

Since having lessons with Penny, I have regained my confidence and feel more positive. I was walking with a decided stoop and shuffling - the [Alexander] Technique has been of great benefit to this, helping me to walk taller and eliminate the shuffling.

M.R. - Farmer's Wife