This study was commissioned by the physiotherapy department of the Children’s Hospital in Helsinki. The purpose was twofold: to study how the brace treatment for children with adolescent idiopathic scoliosis (AIS) as the Children’s Hospital affects their back mobility and to find out if there is scientific evidence for physiotherapy specific exercise as a form of treatment for AIS. The current form of treatment for AIS at the Children’s Hospital is observation followed by brace treatment. Literature shows evidence of brace treatment reducing back mobility, but the physiotherapists at the Children’s Hospital have not experienced this in a clinical setting. An analysis was made of measurements gathered by the Children’s Hospitals physiotherapists during the physiotherapy sessions of children with AIS. Previously the literature has not shown scientific evidence supporting the use of physiotherapy specific training as a treatment method of AIS. The review of literature was made based on the methods of Forsberg & Wengström (2013) and the practical part of this thesis was done based on the methods of Vilkka & Airaksinen (2003). The amount of patients (N=15) for the practical part of this thesis was too small to make any certain conclusions about how brace treatment at the Children’s Hospital affects back mobility, but the results suggest that no significant changes occur during treatment. Of the methods of physiotherapy specific training that were included in this study, Scientific Exercise Approach to Sco-liosis (SEAS) is the only one that both has strong scientific evidence and which might be adjustable to the resources available at the Children’s Hospital. Active postural correction is a physiotherapy specific exercise which could be suitable for the AIS patients at the Children’s Hospital. More high quality randomized controlled trials are needed to get good scientific evidence for more of the physiotherapy specific methods of training as treatment for AIS.