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Title: The force toning in women's softball Objectives: The aim of this study was to demonstrate post-activation potentiation (PAP) following the muscle toning during the strenght training. The toning effect on upper limb explosive force was analyzed following application of two different degrees of resistence. Methods: In this study, we applied randomized selection for the subject to minimize the effect of possible ambiguities such as gender, training status, and player maturity. A homo- -geneous group of well-trained women with the most developed technical response was accepted. (Czech national team, Women's softball). We used the contrast method, where the data were analyzed to determine the effect of different resistance degrees and a fixed rest interval for the strength-dynamic exercise. It is a sticking out of medicine ball in sitting position, which was performed by women of the highest player level. The measurement was processed by using the direct method of dynamic efforts. We compared the explosive force with a medicine ball sticking forward in relation to the distance of the sticking medicine ball by the tested person. Results: The measurement has shown that the PAP generated by toning protocol has a sig- -nificant impact on enhancing the response in explosive drills. The exercise for...