The purpose of the article is to develop and test the effectiveness of aqua fitness exercise program for the posture improvement of women of the first period of a mature age with different body types.  Materials and methods. The pedagogical experiment involved 46 women of the first period of a mature age who had previously consented to participate in the study. The used methods include the analysis and generalization of scientific and methodological literature, Internet data, and mathematical statistics methods, including Fisher’s angular criterion, which allows sampling by distribution of the trait (Byshevets et al., 2019). The research included the assessment of the posture condition of women based on the method of visual screening of posture with determination of the total score (Kashuba et al., 2016). A surgeon was also involved in assessing the posture of women. In the process of factor analysis, the data of anthropometric studies, physical fitness assessments, and motor activity level were analyzed.  Results. The distribution of women of the first period of a mature age by types of postural disorders and its changes under the influence of aqua fitness classes taking into account the body type has been established. The study involved 46 women of the mentioned category; 73.9% of them were women of normosthenic body type, 15.2% – of asthenic type, and 10.9% – of hypersthenic type. The research has established that women who were engaged in aqua fitness with regard to body type had positive changes in posture. The proportion of women of asthenic body type with a normal posture increased by 28.6%, of normosthenic type – by 20.6%, and of hypersthenic type – by 20.0%. Changes occurred in the level of the bio-geometric profile of the posture.  Conclusions. The study confirms the effectiveness of the use of aqua fitness in the process of health-promoting classes to prevent and correct postural disorders.

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At the present stage of development and implementation of means of health improving fitness into health improving sports activities of women first mature age the big variety of such means is notable, and it is necessary to highlight water fitness among those popular means. For effective management of the training process in health improving fitness consideration of the peculiarities of physical development of women first mature age is required as one of the main markers of changes under the influence of the proposed means. The aim of the research was to systematize information on the peculiarities of indicators of physical development of women first mature age, depending on the type of their physique in the process of doing water fitness. Materials and methods of research. The following research techniques were used in the process of research: analysis and generalization of data in scientific and methodical literature, systematization, anthropometry, methods of mathematical statistics (sampling method, method of averages, selected data fit to normal law of distribution by Shapiro-Wilk criterion). The study involved 46 women aged 21 to 35 who do water fitness, among them 58.7 % (n=27) are 26 to 30 years old, 23.9 % (n=11) are less than 25 years old, and 17.4 % (n=8) more than 30 years old. The results of the research are identified advantages in the group of women with harmonious physical development. In accordance with the peculiarities of the distribution of women by body type, the vast majority of them were characterized by normosthenic body type. It turned out that the chest dolichomorphism occurs in women of asthenic type, mesomorphism is typical for women of normosthenic type, and brachymorphismoccurs in women with hypersthenic type. At the same time, according to the ratio of body weight and length a deficiency of body weight is to be noted in the examined asthenic women, but in women of normosthenic and hypersthenic type, this ratio is within the norm. Certain peculiarities should be taken into account for the development of means of influence in the process of fitness classes.