Strength of postural muscles and selected parameters of body posture

Body posture defined by Kutzner-Kozińskiej depends on 3 groups of factors: morphological, functional and environmental. First group indicates that musculo-skeletal-ligament system cooperates (supports) with nervous system. Functional factors are connected with movement habits whereas environmental ones relate to surroundings [1, 2]. To keep upright position posture muscles are required to cooperate antagonistically [3]. The correct position is also influenced by the stato-dynamic fraction where key role is played by flexors and extensors of hip joint, abdominal muscles and dorsum extensors [4]. The group of above mentioned muscles, particularly of dorsum, have the effect on the increase and decrease of spinal curvatures. The size of spinal curvatures determines good body posture alongside with correct organism functioning [5,3] The focal aim of the study was to find the correlation between the moments of force developed by postural muscles and angles of examined spinal parts in relation to the vertical. These angles are held responsible for the size of spinal curvatures.