Objective of the study was to offer and substantiate by computation experiments basics of the athletic biomechanical system trajectory modeling using the mass-inertial characteristics and elementary kinematics of the body parts. Methods of the study. We used for the purposes of the study system-structuring analysis and movement design mathematical/ simulation/ modeling tools to model the biomechanical system kinematics in the computation experiment. Computation experiment was designed to model the athlete`s musculoskeletal system movements using a biomechanical system movement synthesizing mathematical toolkit. The athlete`s musculoskeletal system movement model may be described as the limited kinematic diagram of the connected bodily elements with cylindrical joints that models a biomechanical system plane rotation process around a contact/ support point Results and conclusion. The biomechanical system trajectory modeling experiment showed that when the biomechanical system rotates around a contact point, provided the programmed control and startup conditions are the same, then: • Growths/ falls in masses of the model elements cause no effect on the biomechanical system trajectory; • Elementary angular velocity angular velocity is directly correlated with the length of element i.e. the higher is the element`s length the higher is the angular velocity and vice versa.
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