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IRCT20250528065947N1 IRCT 2026-04-25 The University of Isfahan The Effect of Football+ warm-up program on ACL Injury Risk Factors Effects of the Football+ warm-up program on kinematics and kinetics related to anterior cruciate ligament (ACL) injury during single-leg landing in young male soccer players 2026-08-21 anticipated 46 Recruiting https://irct.ir/trial/83953 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Other design features: Based on the nature of the subject and its execution, this study is quasi-experimental and applied, using a pre-test and post-test design with two parallel groups. Using G*Power software (version 3.1.9.7, University of Kiel, Germany), the sample size calculation for a 2×2 mixed design, focusing on the time × group interaction effect, shows that 15 participants per group (30 in total) are needed to achieve 80% statistical power with an alpha of 0.05, beta of 0.20, and an effect size of 0.06. To prevent the possibility of subject dropout and to improve statistical power, 23 participants per group (totaling 46) will be considered, Randomization description: In this study, participants will be randomly assigned to one of two groups (the intervention group: 10 weeks of Football+ warm-up training and the control group: usual training) using the website www.sealedenvelope.com. Randomization will be conducted using a block randomization method with a 1:1 allocation ratio. To ensure allocation concealment, the randomization code will remain concealed from the time of all baseline measurements until the participant enters the trial. For allocation concealment, randomization will be implemented via a computer-generated sequence, using opaque, sequentially numbered, and sealed envelopes. a card inside each envelope will indicate the group assigned to each participant, Blinding description: The present study will employ a single-blind design, in which only the outcome assessors are blind to their group allocation. Outcome measures are assessed at baseline and post-test by a blinded assessor who remains unaware of both the study hypothesis and methodology. N/A Effects of the Football+ warm-up program on kinematics and kinetics related to anterior cruciate ligament (ACL) injury during single-leg landing in young male soccer players. Intervention 1: Intervention Group (Football+ Warm-up training): This is a football-specific injury prevention program recently designed, developed, and implemented by the Movement and Exercise Science group at the Dortmund Institute of Sport Science, in collaboration with Borussia Dortmund Football Club. The program is delivered as a structured warm-up protocol comprising a series of football-specific exercises aimed at both enhancing movement performance and targeting injury risk factors. Designed to ensure high compliance and adherence within football organizations, the Football+ program consists of three components: 1) Foundation, including running and strengthening exercises; 2) Ball-based training and small-sided games (SSGs); and 3) Explosive performance, including plyometric, agility, and speed drills. The Football+ exercises are categorized into three difficulty levels and are modified and adapted every 4 to 6 weeks based on the players' abilities and progress. Each session lasts approximately 20 to 30 minutes and is performed at least twice per week. Intervention 2: Control group: Control (in this study, the control group will perform their usual and common exercises, including running, static and dynamic stretching exercises). Yes - There is a plan to make this available What will be shared: "The data on primary outcomes can be shared When: "Two months after publication of the results" To whom: All interested parties, including researchers Conditions: There are no other conditions Where to obtain: The principal investigator of the study was contacted via email. How to obtain: They must send their request by email to the principal investigator Comments:
public Arzhang Kiani
university of Isfahan Azadi Square Isfahan, Iran
اصفهان Iran (Islamic Republic of) 8174673441 +98 916 534 6925 Arzhangkian@gmail.com University of Isfahan scientific Arzhang Kiani
University of Isfahan Azadi Square Isfahan, Iran
Esfahan Iran (Islamic Republic of) 8174673441 +98 916 534 6925 Arzhangkian@gmail.com The University of Isfahan Iran (Islamic Republic of) Participants must sign and submit an informed consent form in accordance with the ethics committee format For players under the age of 18, the informed consent form must be signed and approved by their parents Male players aged between 15 and 21 years No participation in similar injury prevention programs No history of ACL injury No acute lower limb injury in the past 6 months No history of lower limb surgery in the past year No history of neurological disorders Participation in three football training sessions per week 15 years 21 years Male Failure to provide the informed consent form History of ACL injury Undergoing lower limb surgery within the past year Prevention Prevention Intervention Group (Football+ Warm-up training): This is a football-specific injury prevention program recently designed, developed, and implemented by the Movement and Exercise Science group at the Dortmund Institute of Sport Science, in collaboration with Borussia Dortmund Football Club. The program is delivered as a structured warm-up protocol comprising a series of football-specific exercises aimed at both enhancing movement performance and targeting injury risk factors. Designed to ensure high compliance and adherence within football organizations, the Football+ program consists of three components: 1) Foundation, including running and strengthening exercises; 2) Ball-based training and small-sided games (SSGs); and 3) Explosive performance, including plyometric, agility, and speed drills. The Football+ exercises are categorized into three difficulty levels and are modified and adapted every 4 to 6 weeks based on the players' abilities and progress. Each session lasts approximately 20 to 30 minutes and is performed at least twice per week Control group: Control (in this study, the control group will perform their usual and common exercises, including running, static and dynamic stretching exercises) Biomechanical Risk Factors Associated with Anterior Cruciate Ligament Injury. Timepoint: At baseline (pre-intervention) and one week post-training. Method of measurement: Single-leg landing test from a 30 cm box to assess lower limb kinematics and kinetics. Lower extremity performance. Timepoint: At baseline (pre-intervention) and one week post-training. Method of measurement: Static and dynamic Y balance test. Isokinetic strength of the quadriceps and hamstrings. Timepoint: At the beginning of the study (pre-test) and then at the end of the study (post-test). Method of measurement: Isokinetic dynamometer (Biodex Multi-joint System 3, Biodex Medical Systems, USA). The University of Isfahan Approved 2026-02-21 Research Ethics Committees of University of Isfahan Postal Code: 8174673441, University of Isfahan, Esfahan, Iran Azadi Square, , Esfahan Isfehan Iran (Islamic Republic of)