The purpose of this study is to identify force and time characteristics of ground reaction forces produced in selected movement exercises of gymnastics that contain elements of take-off and landing. The study was conducted over four athletes, two of sports acrobatics (17 and 18 yo) and two of artistic gymnastics (10 and 11 yo). The vertical ground reaction forces recorded in time were used to calculate maximum force values and characteristic times, and permitted an evaluation of the degree of dynamic overloads. The results of the tests show high levels of dynamic overloads, which may have traumatogenic character.
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