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Objective: Pregnant women are at elevated risk for functional and structural changes in the movement system. Common problems are loss of foot arch height and low back pain which can have strong influence on the decrease in quality of life., Aims: The aim of the study was to assess effect of physiotherapy intervention for preventing and treating changes in foot structure as well as low back pain during pregnancy., Design: Parallel intervention study., Setting: Department of Midwifery, Faculty of Health Sciences, Palacký University Olomouc., Methods: Twelve healthy pregnant women were randomly divided into the experimental and control groups. The women in the experimental group performed daily exercises aimed at the foot arch. The McGill Pain Questionnaire and the Pregnancy Mobility Index were used to measure level of pain and its impact on quality of life. The Foot Posture Index, Navicular Drop test, Chippaux-Šmirák index, and a podoscope were used to evaluate load and anthropometry of the foot. The data were collected at the turn of the first and second trimester and in the third trimester of pregnancy., Results: Statistically significant differences between the baseline and post-intervention were found only in the control group. Pain score obtained from the visual analogue scale as well as the Pregnancy Mobility Index score increased significantly (p = 0.04, p = 0.03 resp.). The Foot Posture Index results increased significantly on both the right (p = 0.04) and left (p = 0.04) lower limb. Chippaux-Šmirák index significantly increased on the right lower limb (p = 0.03)., Conclusions: The intervention prevented or reduced the changes in the foot structure and low back pain. This intervention can be recommended in primary or secondary prevention to increase quality of life in pregnant women.