An interventional study of FIFA 11 in Sport Injuries, sponsored by Acibadem University. Not yet recruiting at 1 site in Turkey (Türkiye). Open to female participants aged 14 Years to 18 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-07-29.
Sponsored by Acibadem University · Not applicable, Interventional, and Prevention
This study aims to investigate the effects of an 8-week FIFA 11+ exercise program on wellness, rating of perceived exertion (RPE), dynamic balance, and single-leg functional performance in young female volleyball players, as well as to examine the relationships among these variables. The study will also evaluate the program's effects on injury incidence and fear of reinjury.
The study is original in applying the FIFA 11+, a well-established injury prevention program, to volleyball and evaluating its effects together with training-load parameters through a multidimensional approach. It is expected to contribute to the literature by proposing a comprehensive model for monitoring athletic performance and injury risk in young female volleyball players.
258 studies on the registry are indexed under Athletic Injuries; 45 are open to participants now.
This study's planned enrollment of 25 is below the median of 44 across 164 interventional studies indexed under Athletic Injuries.
Browse Athletic Injuries studies →Acibadem University is the lead sponsor of 220 studies on the registry; 51 are open to participants now.
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Exclusion Criteria
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will undergo an 8-week non-intervention control period followed by a 2-week washout period and an 8-week FIFA 11+ exercise program in addition to regular volleyball training. The program consists of structured running, strength, balance, plyometric, and agility exercises. Wellness, rating of perceived exertion, dynamic balance, single-leg functional performance, injury incidence, and fear of reinjury will be assessed before and after the relevant study periods.
Other: FIFA 11
Participants will undergo an 8-week non-intervention control period followed by a 2-week washout period and an 8-week FIFA 11+ exercise program in addition to regular volleyball training. The program consists of structured running, strength, balance, plyometric, and agility exercises. Wellness, rating of perceived exertion, dynamic balance, single-leg functional performance, injury incidence, and fear of reinjury will be assessed before and after the relevant study periods.
Injury Incidence
All sports-related injuries occurring during the 8-week pre-intervention control period and the 8-week FIFA 11+ exercise intervention period will be prospectively recorded. Injury incidence will be calculated as the number of new injuries occurring during each study period. The anatomical location, type, severity, mechanism, and time-loss associated with each injury will also be documented.
Time frame: During the 8-week pre-intervention control period and the 8-week FIFA 11+ intervention period
Re-Injury Anxiety Inventory Scores
Re-injury anxiety will be assessed using the Re-Injury Anxiety Inventory (RIAI). The inventory consists of two subscales: anxiety related to the rehabilitation process (RIAI-R) and anxiety related to returning to sport or competition (RIAI-RE). Each item is scored on a 4-point scale ranging from 0 ("Not at all") to 3 ("Very much"). The RIAI-R subscale includes 13 items, with total scores ranging from 0 to 39. The RIAI-RE subscale includes 15 items, with total scores ranging from 0 to 45. Higher scores indicate greater anxiety about sustaining another injury during rehabilitation or returning to sport. Subscale scores will be calculated separately according to the established scoring procedure, including reverse scoring of the relevant items.
Time frame: At the end of the 8-week pre-intervention control period and immediately after the 8-week FIFA 11+ intervention
Daily Wellness Score
Athletes' daily wellness status will be assessed using a wellness questionnaire based on the Hooper Index. The questionnaire evaluates five parameters: sleep quality, fatigue, muscle soreness, stress, and mood. Each parameter will be self-rated on a scale from 1 to 10. Individual parameter scores and the total wellness score will be recorded to monitor athletes' daily physical and psychological status. Higher scores will be interpreted according to the direction of the scoring system specified in the study protocol.
Time frame: Daily throughout the 8-week pre-intervention control period and the 8-week FIFA 11+ intervention period
Single-Leg Hop for Distance Test
Lower-extremity functional performance will be assessed using the Single-Leg Hop for Distance Test. The athlete will stand on the test limb and perform a maximal forward hop, aiming to cover the greatest possible distance while landing on the same limb and maintaining balance. The distance from the starting line to the point of heel contact at landing will be measured in centimeters. Three valid trials will be performed for each limb, and the longest distance will be recorded. A trial will be considered invalid if the athlete loses balance, touches the ground with the opposite foot, or takes an additional step after landing. Higher values indicate better functional performance.
Time frame: At the end of the 8-week pre-intervention control period and immediately after the 8-week FIFA 11+ intervention
Vertical Jump Height
Lower-extremity explosive power will be assessed using the Vertical Jump Test. First, the athlete's maximal standing reach height will be measured while standing upright and reaching overhead with the dominant hand. The athlete will then perform a maximal vertical jump from a standardized starting position with knee flexion and touch the highest possible point. Vertical jump height will be calculated as the difference between the maximal jump reach height and the standing reach height. Three valid trials will be performed, with adequate rest between trials, and the highest jump height will be recorded in centimeters. Higher values indicate greater lower-extremity explosive power.
Time frame: At the end of the 8-week pre-intervention control period and immediately after the 8-week FIFA 11+ intervention
Session Rating of Perceived Exertion and Internal Training Load
Perceived exertion will be assessed after each training session using the Borg Category-Ratio 10 (CR-10) Scale. Athletes will rate their overall perceived exertion on a scale from 0 to 10, where 0 indicates "no exertion" and 10 indicates "maximal exertion." The session rating of perceived exertion (session-RPE) method will be used to calculate internal training load by multiplying the athlete's RPE score by the duration of the training session in minutes. Higher values indicate greater internal training load.
Time frame: After each training session throughout the 8-week pre-intervention control period and the 8-week FIFA 11+ intervention period
Training Session Duration
Training session duration will be recorded as the total time, in minutes, during which athletes actively participate in the main training component. Warm-up and cool-down periods will not be included. In addition, the total duration of moderate- and high-intensity activities performed during each session will be recorded separately as "fitness/aerobic minutes" to provide a more detailed estimate of the athletes' aerobic training exposure and internal workload.
Time frame: Recorded during each training session throughout the 8-week pre-intervention control period and the 8-week FIFA 11+ intervention period
Y-Balance Test Composite and Directional Reach Scores
Dynamic balance will be assessed using the Y-Balance Test. While standing on the test limb, the athlete will reach as far as possible with the opposite limb in the anterior, posteromedial, and posterolateral directions. The hands will remain on the hips, and the stance foot must remain stationary throughout the test. Three valid trials will be performed in each direction, and the maximum reach distance will be recorded in centimeters. Reach distances will be normalized to limb length when appropriate. A trial will be considered invalid if the athlete loses balance, moves the stance foot, places weight through the reaching foot, or fails to return to the starting position under control. Directional reach scores and the composite score will be calculated separately. Higher scores indicate better dynamic balance performance.
Time frame: At the end of the 8-week pre-intervention control period and immediately after the 8-week FIFA 11+ intervention
Plan to share: Undecided
No publications or documents are linked to this record.
Start is estimated for Sep 2026; primary completion for Nov 2026, 2 months later.
Of 119 non-industry interventional studies with no phase under Athletic Injuries, half reached primary completion within 5 months of starting (the median), counting those still running; a quarter within 2 and three quarters within 14. This study's planned 2 months is below that.
Counting every sponsor, half of 121 studies reached it within 5 months; a quarter within 2 and three quarters within 14.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
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