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All Journal Journal of Coaching and Sports Science Physical Education and Sports: Studies and Research
Spyridon Plakias
University of Thessaly
Education Social Sciences

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Inswing or Outswing Corner Kicks? A Meta-Analysis of Offensive Outcomes in Professional Soccer Spyridon Plakias; Vasilis Armatas; Giannis Giakas
Journal of Coaching and Sports Science Vol. 4 No. 2 (2025): Journal of Coaching and Sports Science
Publisher : CV. FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/jcss.v4i2.730

Abstract

Background: Although corner kicks are the most tactically analyzed set pieces in professional soccer, there is still no consensus on whether inswinging or outswinging deliveries are more effective, and no previous meta-analysis has systematically addressed this question.Aims: The study aimed to compare the offensive effectiveness of inswinging and outswinging corner kicks, specifically concerning goal conversion and the creation of final attempts, while also examining differences between domestic and international competitions.Methods: A meta-analysis was conducted using data from 12 eligible studies involving professional competitions. Binary outcomes (goal vs. no goal; final attempt vs. no attempt) were analyzed using log odds ratios under a random-effects model to account for heterogeneity. Subgroup analyses were performed based on competition type (domestic vs. international).Result: The cumulative goal conversion rate from corners was 3.09%, while the rate for final attempts was 25.61%. No statistically significant difference was found between inswinging and outswinging corners regarding goal conversion (OR = 0.99, p = 0.67). However, outswinging corners increase the probability of a final attempt (OR = 0.79, p = 0.02) compared to inswinging corners.Conclusion:  This first meta-analysis comparing corner kick delivery types shows that, while both are equally effective for scoring, outswinging corners lead to more final attempts. Coaches may prioritize outswinging deliveries to improve offensive output and reduce counterattack risk. Future studies should examine contextual factors (e.g., marking systems, delivery zones) and include defensive outcomes for a more holistic tactical understanding.
A domain-specific peer-review checklist for sport science journals: Translating a conceptual framework into practice Spyridon Plakias
Physical Education and Sports: Studies and Research Vol. 5 No. 2 (2026): Physical Education and Sports: Studies and Research
Publisher : CV Rezki Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56003/pessr.v5i2.741

Abstract

The peer-review process plays a central role in ensuring the quality and credibility of scientific research; however, it remains characterized by variability, limited standardization, and a lack of domain-specific evaluation criteria. These limitations are particularly evident in sport science, a multidisciplinary field involving complex, context-dependent, and applied performance data. Although several guidelines for peer-review exist, they are often either generic or tailored to specific domains, limiting their applicability to sport science research. The aim of the present study was to develop a comprehensive, domain-specific reviewer checklist for sport science journals. Building on a previously proposed conceptual framework of publishable research, the checklist operationalizes key dimensions of manuscript evaluation into structured criteria, spanning editorial screening, conceptual foundation, methodological and analytical rigor, research transparency, scientific communication, and scientific and practical impact. In addition, the framework integrates both hierarchical and iterative elements of the peer-review process, conceptualizing manuscript evaluation as a cyclical process that begins and concludes with editorial decision-making. The proposed checklist provides a structured and contextually relevant tool to support reviewers in conducting more consistent and transparent evaluations, while assisting editors in decision-making and offering authors clearer expectations. Although not yet empirically validated, the proposed framework represents a step toward improving the quality, consistency, and contextual relevance of peer-review in sport science.
Co-Authors Giannis Giakas Vasilis Armatas