en فيزيولوژی ورزشی و شاخه‌های وابسته بدان Sport Physiology and its related branches مقاله اصیل Original Article <div style="text-align: justify;"><strong>Background. </strong>The study aims to determine position-specific loads by different tactical strategies. Eighty Turkish Super League U21 players (19.35 &plusmn; 1.6 years, 179.4 &plusmn; 2.3 cm, 75.6 &plusmn; 4.1 kg; M &plusmn; SD) were involved in this study.<br> <strong>Objectives. </strong>The players completed eight different 11v11 training games. While one team practiced the ball possession and &ldquo;defense as a team&rdquo; strategy, the other team implemented the counterattacking strategy.<br> <strong>Methods. </strong>The formation was kept as &ldquo;4-2-3-1&rdquo;. The games were played for 2x20 minutes by using two-thirds of the field. Blood lactate, heart rate, ratings of perceived exertion (RPE), and physical and technical performance were analyzed. Compared to tactical strategy, player load (PL) values were found to be different in all positions (P<0.05).<br> <strong>Results. </strong>The position-specific loads of wingbacks, wingers, and strikers are the positions affected mainly by the strategy. Center-backs demonstrated low values in physical and physiological loads; however, their PL values caused fatigue. Players&rsquo; high-intensity running and sprint numbers are highly correlated with PL values (P<0.05).<br> <strong>Conclusion. </strong>In conclusion, the present study demonstrates the effectiveness of tactical strategy on the position-specific load. Therefore, coaches should consider the game strategy to select the accurate player for the position and specify their training plan.</div> Soccer, Strategy, Time Motion, Player Load, Performance Analysis 0 0 http://aassjournal.com/browse.php?a_code=A-11-1673-1&slc_lang=en&sid=1 Ali Enver Kapelman enver.kapelman@hotmail.com 100319475328460010795 100319475328460010795 Yes Faculty of Sport, Marmara University, Istanbul, Turkey Ali Kızılet akizilet@gmail.com 100319475328460010796 100319475328460010796 No Faculty of Sport, Marmara University, Istanbul, Turkey Tuba Bozdogan tuba.kizilet@marmara.edu.tr 100319475328460010797 100319475328460010797 No Faculty of Sport, Marmara University, Istanbul, Turkey