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| ID | Type | Description | Link |
|---|---|---|---|
| SONP/SP/549693/2022 | Other Grant/Funding Number | Minister of Education and Science |
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| Name | Class |
|---|---|
| Ministry of Science and Higher Education, Poland | OTHER_GOV |
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The primary aim of this observational cohort study is to assess sports specialization, sports performance, history of injuries (prevalence, types, areas, duration) and quality of life in young healthy athletes aged 8-16 from Poland. Athlete profiles will be created based on the variables (explained in detailed description) examined. Furthermore, the investigators will perform one-year injury follow-up.
The main questions it aims to answer are:
Recruited young healthy athletes (8-16 years-old) from sports schools, clubs, teams will invited to study. There will be performed assessment, which included:
One-year after meetings, there will be send questionaire and phone-call to participants and their coaches/parents in order to obtain information about injuries (location, type, time-loss, etc.).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Young Athletes | 300 young athletes (boys and girls, 9 - 16 years-old) from clubs, teams, associations, sports classes of various disciplines in the Pomeranian Voivodeship |
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| Measure | Description | Time Frame |
|---|---|---|
| Number of Participants with sports injury after one-year follow-up | Dichotomous assessment (0 = no injury, 1 = injury) based on a telephone interview with the parent/guardian/coach. Conditions to meet: 12 months after the date of examination, and continuity of participation in sports to the date of injury | One year after the date of examination |
| Type, location, duration, and return to sports in participants with injury at one-year follow up | Assessment based on a telephone interview with the parent/guardian/coach. Questions about:
| One year after the date of examination |
| Measure | Description | Time Frame |
|---|---|---|
| Sports Specialization | Sports specialization defined as "intensive year-round training in a single sport at the exclusion of other sports". Where a highly specialized athlete may be able to (1) choose a main sport, (2) participate for greater than 8 months per year in 1 main sport, and (3) quit all other sports to focus on 1 sport. | through study completion, an average of 1 year |
| Measure | Description | Time Frame |
|---|---|---|
| Sport workload (hours per trainings or competition) | Sports and training volume (hours per trainings or competition, weekly) | through study completion, an average of 1 year |
| Peak Height Velocity | Peak Height Velocity (PHV) calculated using the 'maturity offset' value (report as "PHV years") - Mirwald formula |
Inclusion Criteria:
Exclusion Criteria:
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Young healthy athletes (8-16 years-old) from sports schools, clubs, teams from the territory of the Pomeranian voivodeship, Poland.
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| Name | Affiliation | Role |
|---|---|---|
| Bartosz Wilczyński, phD | Department of Immunobiology and Environment Microbiology, Medical University of Gdańsk | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Immunobiology and Environment Microbiology, Medical University of Gdańsk | Gdansk | 80-211 | Poland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 36009793 | Background | Wilczynski B, Radziminski L, Sobierajska-Rek A, de Tillier K, Bracha J, Zorena K. Biological Maturation Predicts Dynamic Balance and Lower Limb Power in Young Football Players. Biology (Basel). 2022 Aug 3;11(8):1167. doi: 10.3390/biology11081167. | |
| 35682301 | Background | Wilczynski B, Radziminski L, Sobierajska-Rek A, Zorena K. Association between Selected Screening Tests and Knee Alignment in Single-Leg Tasks among Young Football Players. Int J Environ Res Public Health. 2022 May 31;19(11):6719. doi: 10.3390/ijerph19116719. |
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Individual participant data that underlie the results reported in this article, after deidentification (text, tables, figures, and appendices).
The data that will be collected include data sets, i.e., personal survey questionnaires, measurement scales, functional and anthropometric assessment measurements, described in the description section of the scientific activity.
Part of the data will be published in the public repository of the Polish Medical Research Platform and the Zenodo repository. Part of the data will be published in scientific journals, which may also require publication of raw data. Data will be made available at the latest at the time of publication.
Data are available indefinitely at Polish Medical Research Platform and the Zenodo repository.
Immediately following publication. No end date
Anyone who wishes to access the data
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| ICF | No | No | Yes | Informed Consent Form | Jan 15, 2023 | Apr 22, 2024 | ICF_000.pdf |
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| ID | Term |
|---|---|
| D001265 | Athletic Injuries |
| ID | Term |
|---|---|
| D014947 | Wounds and Injuries |
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| History of sports-related injuries | Questionaire - Question about sports-related injuries within sports career (sports participating in trainings and competitions) which included:
Answers will be performed from young athlete and coach. If there will be occasion, answers will be matched with answers from parents/guardians. | through study completion, an average of 1 year |
| Health-related quality of life: EQ-5D-Y | Patient Reported Outcome instruments" EQ-5D-Y - EuroQol Research Foundation - Certified Translation: Polish for Poland. The EQ-5D is a widely used standardized generic measure of HRQOL. A valid and accurate translation of the corresponding original document. A child-friendly version of the EQ-5D (0-100 points, where "0" means the worse quality of life, and "100" means perfect). (EQ-5D is the name of the instrument and is not an acronym.) | through study completion, an average of 1 year |
| Y-Balance Test - dynamic balance test | Dynamic Balance of the lower extremities (record as reach distance in centimeters "cm" and normalized reach distance in percentages "%") | through study completion, an average of 1 year |
| Functional Movement Screen (FMS) | The Functional Movement Screen (FMS) is a screening tool used to identify limitations or asymmetries in movement patterns. FMS consists of 7 movement tasks (deep squat, lunges, hurdle steps, a push-up, straight-leg raises, shoulder mobility, and rotary stability). Each task will be visually assessed by an experienced physiotherapist and marked on a 4-point scale (0-3, worst-best). The total maximum score that can be obtained is 21 points. | through study completion, an average of 1 year |
| Hand-Held Dynamometer (HHD) measurement - Isometric Strength of the lower extremities muscle | Hand-Held Dynamometer (HHD) measurement (Laffayette, USA). Isometric Strength (peak force, average force (kilograms), of the lower extremities muscle (gluteus medium, quadriceps, hamstring, triceps surae. | through study completion, an average of 1 year |
| through study completion, an average of 1 year |
| Sports discipline and position | Sport discipline (e.g. soccer) and Sports position (e.g. on the soccer field: defender) | through study completion, an average of 1 year |
| Participants characteristics - Body Mass Index | weight and height will be combined to report BMI in kg/m^2 | through study completion, an average of 1 year |
| Sports experience | Sports experience (years, months) | through study completion, an average of 1 year |
| 37932373 | Background | Bruzda R, Wilczynski B, Zorena K. Knee function and quality of life in adolescent soccer players with Osgood Shlatter disease history: a preliminary study. Sci Rep. 2023 Nov 6;13(1):19200. doi: 10.1038/s41598-023-46537-7. |
| 33406658 | Background | Wilczynski B, Hinca J, Slezak D, Zorena K. The Relationship between Dynamic Balance and Jumping Tests among Adolescent Amateur Rugby Players. A Preliminary Study. Int J Environ Res Public Health. 2021 Jan 4;18(1):312. doi: 10.3390/ijerph18010312. |
| 41310813 | Derived | Wilczynski B, Buler J, Buler RL, Grochowski ML, Puchalski B, Zorena K. Strength and balance asymmetries in children and adolescents: comparison between single- and multi-sport participants. BMC Sports Sci Med Rehabil. 2025 Nov 27;17(1):358. doi: 10.1186/s13102-025-01420-y. |