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All Journal Tanjungpura Journal of Coaching Research Journal of Applied Movement and Sport Science (JAMSS)
Ivanov, Danail
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Comparative analysis of body composition in youth elite football players: Insights from professional academies Ivanov, Danail
Tanjungpura Journal of Coaching Research Vol 3, No 2 (2025): Tanjungpura Journal of Coaching Research
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/tajor.v3i2.90501

Abstract

Background and Study Aim. Body composition plays an important role in determining athletic performance in soccer. Optimal levels of muscle mass and body fat percentage are key factors that influence speed, endurance, strength and overall physical readiness. Understanding and monitoring these parameters is crucial for player development, allowing coaches to design effective training programs tailored to their individual needs.Material and Methods. This study examined the body composition profiles of 66 football players from the academy of PFC Levski Sofia, categorized into four age groups: U15, U16, U17, and second team. Measurements were taken using the InBody 230 bioelectrical impedance analyzer, which assesses key metrics such as skeletal muscle mass, body fat percentage, BMI and fat-free mass. To identify significant age-related trends, advanced statistical methods were used, including descriptive analysis, ANOVA, and regression analysis.Results. The ANOVA results validated these findings, by showing statistically significant differences between age groups (F-statistic = 1199.91, p 0.05). These results confirmed that anthropometric indices, including weight, height, BMI, and body fat percentage, varied significantly across different age categories, highlighting the importance of customized training and nutrition strategies at each stage of development. The findings revealed a consistent increase in body weight, height and BMI with age, accompanied by a significant decrease in body fat percentage. These trends are in line with existing literature, which reinforces the importance of body composition monitoring as part of player development.Conclusions. This study underscores the importance of body composition monitoring in optimizing performance, preventing injury, and guiding individualized training programs for elite youth soccer players. Customized training and nutrition strategies are essential to ensure optimal physical development and long-term success in competitive soccer.
Coaching diversity in Bulgarian youth football: A factorial, cluster, and SWOT analysis of methodologies and development strategies Ivanov, Danail
Tanjungpura Journal of Coaching Research Vol 3, No 3 (2025): Tanjungpura Journal of Coaching Research
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/tajor.v3i3.96271

Abstract

Background. Contemporary youth football development requires evidence-based coaching methodologies that align with both theoretical models and practical demands. However, discrepancies between elite and grassroots coaching approaches remain underexplored. This study aimed to identify prevailing pedagogical profiles among Bulgarian youth football coaches and to analyze the systemic factors shaping coaching practice. Methods. A mixed-methods design was employed, combining exploratory factor analysis (EFA), cluster analysis, and SWOT (strengths"“weaknesses"“opportunities"“threats) diagnostics. Data were collected from a national sample of 392 UEFA-licensed coaches working at different age and club levels. Results. Three pedagogical profiles emerged: game-based (28.1% variance, α = 0.85), technical/traditional (21.4%, α = 0.77), and tactical/structured (15.8%, α = 0.79). While elite academies favored tactical frameworks, grassroots coaches predominantly used isolated drills (λ = 0.82), revealing a clear gap between coaching theory and field application. SWOT findings indicated strong coach dedication and player motivation (95 mentions), but also systemic weaknesses such as methodological inconsistency (52 mentions) and infrastructural deficits. Opportunities included the integration of digital tools and sports science, whereas threats focused on talent emigration and limited funding. Conclusions. There is a need for greater coherence between pedagogical models and everyday coaching practices, particularly at the grassroots level. Contributions: This study introduces the first data-driven typology of Bulgarian youth coaches and offers actionable insights for modernizing coach education systems through frameworks such as Teaching Games for Understanding (TGFU) and the Constraints-Led Approach (CLA).
Stimulation of physical fitness through traditional games in elementary school students: A systematic review in Indonesia Suryadi, Didi; Ivanov, Danail; Zulnadila, Zulnadila
Journal of Applied Movement and Sport Science Vol. 1 No. 3 (2025): Journal of Applied Movement and Sport Science
Publisher : Khatulistwa Education Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65575/jamss.v1i3.92

Abstract

Background Physical fitness plays a crucial role in supporting elementary school students’ ability to engage in learning activities without experiencing excessive fatigue. Adequate fitness levels enable students to maintain concentration and participate actively in school tasks. In Indonesia, information regarding the physical fitness of elementary school children remains limited, despite its importance for promoting overall health and learning readiness. Objectives This systematic review aims to examine the existing scientific literature on the role of traditional games as a learning strategy to improve physical fitness among elementary school students in Indonesia. Methods A systematic search was conducted across four major databases—ScienceDirect, Scopus, Google Scholar, and PubMed. The search strategy employed a combination of keywords, including (“traditional games” OR “play model”) AND “physical fitness” AND “students” AND “elementary school.” The review process followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, including screening, eligibility assessment, and data extraction from relevant studies. Results The findings indicate that traditional games positively contribute to improving students’ physical fitness. These games are typically designed using a play-based approach and incorporate activities aligned with children’s fundamental motor skills and developmental stages. Improvements occur because traditional games encourage active participation, increase movement engagement, and support effective fitness development within physical education settings. Conclusion Traditional games represent an effective and culturally relevant strategy for enhancing physical fitness among elementary school students in Indonesia. Their integration into physical education classes can promote active learning and contribute to better health outcomes. This review provides comprehensive evidence on the pedagogical value of traditional games in improving children’s physical fitness, highlights their relevance for culturally grounded physical education practices, and offers insights for researchers, educators, and policymakers seeking to optimize school-based fitness interventions.
Effectiveness of circulo massage on fatigue recovery of boarding school students Abdulloh, Faza Muhamad Tamyiz; Rahayu, Atikah; Kushartanti, B. M. Wara; Ivanov, Danail; Jurek, Joanna Michalina
Tanjungpura Journal of Coaching Research Vol 4, No 1 (2026): Tanjungpura Journal of Coaching Research
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/tajor.v4i1.92920

Abstract

Background. Circulo massage was claimed to be effective for fatigue recovery. This massage technique is meant to improve blood flow to the body's extremities. This helps move and get rid of metabolic waste products while also relaxing muscles and nerves. However, there was still a lack of evidence with student as the research subjects. Objectives. Therefore, this study was designed to see the effectiveness of circulo massage in decreasing fatigue among boarding school students. Methods. The study design used in this research was a pre-experimental one with a one-group pretest–posttest design. The subjects were the students of IJ Al-Masyhuriyyah Complex of Al-Munawwir Krapyak Islamic Boarding School, Yogyakarta. The population in this study were 41 students while the samples were 15 students. The data in this research were collected using the Fatigue Assessment Scale (FAS) as the pretest and posttest to determine the fatigue condition. The data analysis was performed using a paired t-test to obtain the amount of change and the significance of the changes in fatigue levels after circulo massage was given. Results. Circulo massage treatment reduced the fatigue scores of the subjects ((Mpre = 35.93 ± 6.67, Mpost = 19.07 ± 4.33, p < 0.001). This result shows that the circulo massage had a statistically significant effect for fatigue recovery. Conclusion. The result of this study can be used as a reference by the students in choosing a treatment or intervention to reduce fatigue due to their daily activities as a student and boarding school student life. This study also provided information about scientific evidence in the massage effect for fatigue recovery.
Coaches' perceptions and practices regarding set pieces in football: A survey study of Bulgarian and international coaches Ivanov, Danail
Tanjungpura Journal of Coaching Research Vol 4, No 1 (2026): Tanjungpura Journal of Coaching Research
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/tajor.v4i1.105767

Abstract

Background. Set pieces represent a significant component of modern football performance, yet their systematic preparation remains inconsistent across coaching levels. Objectives. This study aimed to examine coaches’ perceptions and practices regarding set-piece training among Bulgarian and international football coaches. Methods. This study investigated the perceptions and training practices related to set pieces among 342 Bulgarian football coaches and 49 international coaches (N = 391), using an online descriptive survey with Likert-scale, categorical, and open-ended items. Data were analyzed via descriptive statistics, chi-square tests of independence, Cramér's V, and Spearman rank correlations using IBM SPSS Statistics v.28. Results. Results revealed a significant gap between coaches' high perceived importance of set pieces (M = 4.07 ± 0.98, Bulgarian; M = 4.10, international) and their relatively low ratings of current quality in Bulgarian football (M = 2.43 ± 0.81). Training frequency was predominantly once per week (42.5%), and multimodal communication methods were adopted by only 6.7% of Bulgarian coaches. Significant associations were found between coaching license and training frequency (χ² = 53.34, p < .001, V = .20), competition level and use of structured schemes (χ² = 63.07, p < .001, V = .31), and license level and analytical practices (χ² = 87.60, p < .001, V = .30). Strong Spearman correlations confirmed that higher qualification (rs = .89), elite competition level (rs = .92), and greater perceived goal contribution from set pieces (rs = .85) were all positively associated with deeper preparation investment. Conclusion. Findings indicate a systemic perception–practice gap and underscore the need for structured methodological support, visual communication tools, and specialized coaching roles. This study contributes by providing empirical evidence to support the development of structured methodologies, enhanced analytical integration, and specialized coaching roles in football training systems.
Co-Authors Abdulloh, Faza Muhamad Tamyiz Atikah Rahayu Bernadeta M Wara Kushartanti Didi Suryadi Jurek, Joanna Michalina zulnadila, zulnadila