• Karel Jelen
  • Stanislav Otàhal
  • Antonín Doleal
Keywords: cinematography, impact loading, computers, pregnant uterus, simulation


INTRODUCTION: The improvement of pregnant women's safety in work, leisure and physical activities is an important issue in any society. Impact loading of a pregnant uterus often causes various complications during pregnancy, including a possible unwanted miscarriage. The determination of the vibration frequency of the uterus during pregnancy is relevant for further mathematical-physical interpretation. METHODS: A high-frequency cinematographic recording of a pregnant uterus' response to a defined impact loading was analyzed using a film analyzer. A pregnant uterus, inclusive of the topically relevant organs (5.1 kg), was represented by a pregnant woman in the presence of a gynecologist. The impact load was realized by standing on tiptoe and free fall on the heels. RESULTS: The selected behavioral characteristics of the examined object are as follows: - impulse 2.72 Ns - T – period 0.933 s - amplitude 0.009 m - frequency 1.07 Hz - absorption 6.73 s-1 The real angular frequencies that are necessary for the assessment of the risk frequency zone of vibrations proved to be relevant for further practical interpretation, as well as the viscous absorption coefficient reflecting value changes in the volitional activity of an individual, which can be changed in relation to the perception of external conditions. For this we do not have a correct value. CONCLUSIONS: Regarding the methodological difficulty, the above-mentioned characteristics must be considered limiting. First, it will be made more accurate, and then it will be used in mathematical modeling of the impact loading of a pregnant uterus and will contribute to solving the risky physical routines of pregnant women in the area of sports, leisure and work activities.