en عمومى General پژوهشي Research <div style="text-align: justify;"><strong>Purpose</strong>: This study aimed to assess the effects of a 6-week training program that combined stretching and strength exercises on the performance of novice football players aged 15 to 18 years.&nbsp;<br> <strong>Methods</strong>: A double-blind randomized controlled trial (RCT) was conducted with 46 participants divided into four groups: A) dynamic high-intensity resistance training (DHIRT) (n=12), B) static stretching (n=13), AB) Combined DHIRT+stretching (n=11), and C) control (n=10). Performance outcomes included vertical and horizontal jump (VJ and HJ) distances, running speed (RS), acceleration (ACC), endurance (VO₂ max), shooting speed (SS), and heart rate (HR). Repeated-measures analysis of variance (ANOVA) and post-hoc analyses were used to assess group differences and time effects.<br> <strong>Results</strong>: A repeated-measures ANOVA showed a significant effect of time (&eta;&sup2;=0.827) and a significant time-by-group interaction (&eta;&sup2;=0.418), indicating substantial intervention effects. Pairwise comparisons revealed that the combined training group (AB) demonstrated statistically significant improvements over the control group (C) in HJ (P=0.003), RS (P=0.003), VO₂ max (P=0.000), endurance (P=0.000), SS (P=0.018), and ACC (P=0.000). Vertical jump (VJ) improved by 2.97%, HJ by 6.85%, and VO₂ max by 5.83% in the combined Group. No significant intergroup differences were observed in HR (P>0.05).<br> <strong>Conclusion</strong>: Combining DHIRT and static stretching is more effective than either intervention alone for improving football-related physical attributes in novice players.</div> Static stretching, Resistance training, Football, Athletic performance, Athletes, Adolescent 353 374 http://ptj.uswr.ac.ir/browse.php?a_code=A-10-707-1&slc_lang=en&sid=1 Hussein Ziab houssein.ziab@gmail.com 0000-0001-5777-8620 Yes Department of Physical Education, Faculty of Education, University of Sciences and Arts in Lebanon, Beirut, Lebanon. Hani Deeb ABODEEB976120@GMAIL.COM 0009-0002-2826-3315 No Department of Physical Education, Faculty of Education, University of Sciences and Arts in Lebanon, Beirut, Lebanon. Hassan Deeb hasandeeb661@gmail.com 0009-0001-4868-3774 No Department of Physical Education, Faculty of Education, University of Sciences and Arts in Lebanon, Beirut, Lebanon. Rami Mazbouh ramielmazbouh@gmail.com 0000-0002-6122-3780 No Department of Physiotherapy, Faculty of Public Health, Lebanese University, Beirut, Lebanon.