The purpose of this action research study was to examine the effect of an adapted swimming program in terms of improving the performance and behaviour of an individual with kyphosis-scoliosis, with the use of an individualised education approach. The sample consisted of an adult woman with kyphosis-scoliosis. The pre-swimming phase included a holistic evaluation of the abilities of the individual in terms of swimming performance, measurement of the behaviour according to the Rutter Scale and physical-health variables. Next, the subject followed an adapted swimming program based on the Halliwick Method. The duration of the swimming program was 6 months at a frequency of two times per week, for 60 minutes. Each session included additional muscle strength and body posture exercises outside water. At the end of the swimming program the initial measurements were repeated. The results of the study revealed the beneficial effect of the swimming lessons in terms of improving the swimming abilities and the behaviour of the individual. In the light of the findings, useful conclusions were drawn regarding the structure of the swimming program. (Contains 3 tables.)