基金关于作者(Contributors) : PL and GL had the original idea for this protocol DS and FO had been working on a parallel protocol. The protocol was developed by all the authors. PL led the grant application in conjunction with DS, GL, and PS (principal investigators). FW coordinated the trial on a day to day basis supervised by PL and helped by JB and KM, and managed the Southampton site. KM managed the database, supervised by PS. ME and AB managed the Bristol site on a day to day basis, supervised by DS. KB and FO coordinated the development of the Alexander technique intervention and monitoring. LY coordinated the development of the exercise prescription intervention and monitoring. All authors contributed to regular meetings on trial management. PL and PS did the analysis, which was discussed by all authors. PL wrote the paper, and all authors contributed to revisions of the paper. PL is guarantor for the paper. 资助(Funding): This work was supported by the Medical Research Council [grant number G00011041. The Medical Research Council was independent of the running, analysis, and interpretation of the trial. GL's post is supported by the Rufford Maurice Laing Foundation.