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

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Inswing or Outswing Corner Kicks? A Meta-Analysis of Offensive Outcomes in Professional Soccer Plakias, Spyridon; Armatas, Vasilis; Giakas, Giannis
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.
Reclaiming the value of qualitative analysis in sports performance research Plakias, Spyridon
Physical Education and Sports: Studies and Research Vol. 5 No. 1 (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.v5i1.672

Abstract

Quantitative metrics and technology-driven approaches have reshaped sports performance analysis (SPA), yet they risk overshadowing the equally vital contribution of qualitative methods. This opinion paper highlights the value of qualitative analysis in capturing the complexity, context, and meaning of player and team behaviors, elements that numbers alone cannot explain. Drawing on video-based evaluations, case studies, and narrative reconstructions, qualitative approaches provide insights into tactical, psychological, and interactional dimensions of performance that are indispensable for bridging the science–practice gap. By integrating qualitative and quantitative perspectives, SPA can achieve a more balanced and applicable paradigm, ensuring that scientific research remains relevant to real-world coaching and athlete development. This paper calls for a renewed recognition of qualitative methods as a central pillar of SPA and invites further scholarly contributions to this evolving discussion.
Co-Authors Armatas, Vasilis Giakas, Giannis