Abstract
Asymmetry of body parts refers to absence of symmetry and unevenly developed body parts in terms of the axis and plane. It has been long ago noticed that no perfectly correct human body exists, and bodies are to a greater or lesser extent asymmetric. A passive way of life, insufficient movement and inappropriate ergonomics of the workplace have a negative impact on the skeletal muscle system, usually resulting in reduced muscle power, static and dynamic muscle endurance, and altered muscle tone. The aim is to determine whether muscle myotonometry parameters are informative in early risk diagnostics to predict the likelihood of skeletal muscle system trauma. The study involved 382 people aged 18-24. Participants were devided into two groups: according to the accumulated composite score. Testing was made one time. The study consisted of functional movement and myotonometry evaluation. The study analyses and presents comparisons of the results depending on the trauma likelihood and sex. In addition, asymmetry of the left and the right body side is investigated. The analysis of the asymmetries (delta) in the frequency of damped oscillations of trapezius, biceps femoris, gastrocnemius (inner and outer part) on the left and right sides of the body demonstrated greater asymmetries between the left and the right sides of the body in the groups of both men and women with a lower chance of trauma. The assessment of asymmetries in femoris rectus and tibialis anterior between the left and the right sides of the body showed differences in the frequency of damped oscillations in all groups. Muscle myotonometry parameters are informative and may be used in early risk diagnostics to predict skeletal muscle system trauma. The asymmetry in tibialis muscle tone between the left and the right leg causes poorer parameters of functional movement performance in women. No associations were found to exist with the ability to perform functional movements in men. The asymmetry in femoris muscle tone between the left and right leg demonstrates the ability of young subjects to perform functional movements. It is characteristic of men and, to a lower extent, of women.
Highlights
Body symmetry is primarily understood as a proportionate distribution of equal body parts or forms
Insufficient movement and inappropriate ergonomics of the workplace have a negative impact on the skeletal muscle system, usually resulting in reduced muscle power, static and dynamic muscle endurance, and altered muscle tone [6,7,8]
An increased muscle tone demonstrates an increase in the internal tension, which leads to poorer blood circulation and metabolism conditioning pain, injuries and overload [37]
Summary
Body symmetry is primarily understood as a proportionate distribution of equal body parts or forms. Normal functioning of the skeletal muscle system allows our body to maintain balance without additional activity of muscles; occurring asymmetric changes in the skeletal muscle system result in fatigue and deformation of body structural parts [3, 4]. Asymmetry of body parts refers to absence of symmetry and unevenly developed body parts in terms of the axis and plane [5]. ASSOCIATIONS BETWEEN MUSCLE MYOTONOMETRY (A)SYMMETRY AND FUNCTIONAL MOVEMENT PERFORMANCE IN YOUNG WOMEN AND MEN. All asymmetries of the neuromuscular systems result in the occurrence of scoliosis, changes of spinal kyphosis and lordosis as well as physiological disorders and functional injuries of the thorax [9]
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