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Articles

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Changes of Lactate Threshold during a Half-Year Training Cycle in “Arka Gdynia” Football Players
Wojciech Ignatiuk, Pawel Rompa, Lukasz Radziminski, Robert Dargiewicz, and Zbigniew Jastrzebski

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Physical Performance, Body Composition and Body Balance in Relation to National Ranking Positions in Young Polish Tennis Players
Mateusz Karnia, Tomasz Garsztka, Mateusz Rynkiewicz, Tadeusz Rynkiewicz, Piotr Zurek, Marcin Luszczyk, Ewelina Sledziewska, and Ewa Ziemann

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The Efficiency Model of Goalkeeper’s Actions in Soccer
Andrzej Szwarc, Patrycja Lipinska, and Michal Chamera