Introduction. Asymmetric body posture lately is more and more often diagnosed among adolescents in Lithuania also in other countries. In this stage of development, the posture undergoes many adjustments and adaptations due to changes of the body and to demanding psychosocial factors. Consequences of this widely spreading health disorder are very important as for physical health and so for social and mental wellbeing. Asymmetric body posture is considered not only one of the most common adolescents’ musculoskeletal system disorders (Juškelienė, 1996; Lindišienė, 1999; McEvoy, 2005) but also one of the possible signs or reasons of scoliosis (Nissinen et al., 1993; Hazebroek et al, 1992). Posture asymmetry may influence reduced musculoskeletal system functioning. It was established negative influence of asymmetric posture on cardiovascular system’s function (Sucato, 2003), pulmonary function (Lin, 2001), urogenital system’s function (Mohanty, 2000), nervous system’s functioning (Wiggins, 2003). Also children with posture disorders more often have insecurity and inferiority feelings (Saccomani, 1998), and more often suffer from depression and anxiety episodes (Norris, 1992). The normal development of spine curvatures depends on the interaction between heritable growth factors and the mechanical environment in which the spine grows. Sedentary life style among schoolchildren decreases their physical and social wellbeing. The research works emphasize, that proper physical activity... [to full text]