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>Coaches predominantly utilize linear training protocols to enhance the aerobic power of football players. However, there is limited data on the effects of change of direction (COD) protocols on aerobic power in football.<br> <strong>Objectives. </strong>This study aimed to determine which high-intensity interval training (HIIT) program&mdash;linear (LHIIT) or change of direction (COD)&mdash;has a more significant impact on increasing aerobic power in senior female football players.<br> <strong>Methods. </strong>Sixty senior female football players were divided into two experimental groups: LHIIT (n=30) and COD (n=30). Both groups underwent a four-week HIIT protocol, with LHIIT involving linear and COD incorporating change-of-direction exercises. Aerobic power was measured using the 30-15 intermittent fitness test (IFT), maximal aerobic velocity (MAV), and VO2max at the beginning and end of the study to assess the differences in aerobic adaptations between the two programs.<br> <strong>Results. </strong>The results indicated that the COD group eliminated the significant difference in VO2max that initially existed between the two groups, suggesting that COD protocols may be more effective in increasing aerobic power than linear ones. Additionally, both groups significantly improved the 30-15 IFT, MAV, and VO2max.<br> <strong>Conclusion. </strong>Both linear and change-of-direction HIIT protocols significantly enhance aerobic performance in senior female football players. However, COD protocols may have a more significant impact on VO2max improvement. Future research should explore the potential effects of COD protocols on anaerobic power and seek to identify even more effective HIIT strategies for enhancing VO2max.</div> Cardiorespiratory Fitness, High-Intensity Interval Training, Soccer, Female, Professional Athletes 0 0 http://aassjournal.com/browse.php?a_code=A-11-2326-1&slc_lang=en&sid=1 Besnik Morina 100319475328460016714 100319475328460016714 No Faculty of Physical Education and Sport, University of Prishtina “Hasan Prishtina”, Priština, Republic of Kosovo Grgur Višić grgur.visic@student.kif.hr 100319475328460016715 0009-0002-9601-8725 Yes Department of General and Applied Kinesiology, Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia Davorin Antonić 100319475328460016716 100319475328460016716 No Department of General and Applied Kinesiology, Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia Matej Babić 100319475328460016717 100319475328460016717 No Department of General and Applied Kinesiology, Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia Goran Sporiš 100319475328460016718 100319475328460016718 No Department of General and Applied Kinesiology, Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia Tomislav Vlahović 100319475328460016719 100319475328460016719 No Department of Hand Surgery, University Hospital Centre “Sisters of Mercy”, Clinic for Traumatology, Zagreb, Croatia Miljenko Franić 100319475328460016720 100319475328460016720 No Department of Traumatology and Orthopedics, Clinical Hospital Dubrava, Zagreb, Croatia Ivica Franjko 100319475328460016721 100319475328460016721 No Faculty of Kinesiology, University of Osijek, Osijek, Croatia Zvonimir Tomac 100319475328460016722 100319475328460016722 No Faculty of Kinesiology, University of Osijek, Osijek, Croatia Onur Akman 100319475328460016723 100319475328460016723 No Sports Science Faculty, Bayburt University, Bayburt, Turkey