An observational study in Adolescence, Body Composition and Physical Performance, sponsored by Firat University. Completed at 1 site in Turkey (Türkiye). Open to male participants aged 11 Years to 15 Years. Per ClinicalTrials.gov, last updated 2026-10-23.
Sponsored by Firat University · Observational
This study aimed to examine the relationships among psychological characteristics, hormonal markers, body composition, and physical performance in adolescent male football players. Twenty-one male football players participated in this cross-sectional correlational study. Assessments included anthropometric measurements, jumping, sprinting, agility, kick speed, psychological well-being in sport, and mental toughness. Blood samples were collected to measure testosterone, FT3, and FT4 levels. Data were examined using partial correlation network analysis, centrality analysis, hierarchical clustering, and principal component analysis.
This study was designed to examine conditional associations and similarity-based patterns among psychological, hormonal, and physical characteristics in adolescent male football players. It employed a cross-sectional correlational design and did not involve any training or therapeutic intervention.
Assessments were conducted during measurement sessions held on separate days. These sessions included evaluations of body composition, motor performance, and psychological characteristics. Venous blood samples were collected for hormonal analyses.
The analytical approach included network analysis to examine conditional associations among variables, centrality measures to assess their positions within the network, and hierarchical clustering to identify groups of variables with similar characteristics. Principal component analysis was used to summarize the multivariate data structure. Given the cross-sectional design, the analyses were intended to explore associations and patterns within the study sample rather than establish causal relationships.
Firat University is the lead sponsor of 117 studies on the registry; 46 are open to participants now.
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The study population consisted of adolescent male football players aged 12-14 years who actively played for a single U-14 football team in Bingöl, Türkiye, and participated in regular football training. Twenty-one players voluntarily participated in the study.
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Exclusion Criteria:
Adolescent male football players underwent anthropometric and body composition assessments, physical performance tests, and psychological questionnaires during measurement sessions held on separate days. Venous blood samples were collected to measure testosterone, free triiodothyronine (FT3), and free thyroxine (FT4) levels. No training or therapeutic intervention was administered.
Hormonal Markers, Psychological Scores, Physical Performance, and Body Composition
Serum total testosterone, free triiodothyronine (FT3), and free thyroxine (FT4) were measured by immunoassay in a 5 mL venous blood sample collected after at least 12 hours of fasting. Psychological well-being was assessed using a 23-item scale (23-115 points), and mental toughness using an eight-item index (mean score: 1-7); higher scores indicate better well-being or toughness. Countermovement jump height was measured using a jump mat, standing long jump distance using a tape, 10 and 20 m sprint and T-test times using electronic timing, and kick speed using radar. The best of two trials was retained; higher jump and kick speed values and shorter times indicate better performance. Body weight, BMI, body fat percentage, and skeletal muscle percentage were assessed using bioelectrical impedance, and height using a stadiometer.
Time frame: Assessed once per participant across four assessment sessions spaced 48 hours apart, over approximately 6 days from the first to the final session.
- Total testosterone, FT3, and FT4 levels - Psychological well-being in sport and mental toughness scores - Jump, sprint, change-of-direction, and kick speed performance - Body composition measures used in the analysis
Serum total testosterone, free triiodothyronine (FT3), and free thyroxine (FT4) were measured by immunoassay in a 5 mL venous blood sample collected after at least 12 hours of fasting. Psychological well-being was assessed using a 23-item scale (23-115 points), and mental toughness using an eight-item index (mean score: 1-7); higher scores indicate better well-being or toughness. Countermovement jump height was measured using a jump mat, standing long jump distance using a tape, 10 and 20 m sprint and T-test times using electronic timing, and kick speed using radar. The best of two trials was retained; higher jump and kick speed values and shorter times indicate better performance. Body weight, BMI, body fat percentage, and skeletal muscle percentage were assessed using bioelectrical impedance, and height using a stadiometer.
Time frame: Assessed once per participant across four assessment sessions spaced 48 hours apart, over approximately 6 days from the first to the final session.
Plan to share: Undecided
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From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is completed, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.
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