Reliability and Validity of Kinovea Software in Assessing Change of Direction Performance in Youth Soccer Players: A Comparative Analysis with Witty Gate System

Genç Futbolcularda Yön Değiştirme Performansının Değerlendirilmesinde Kinovea Yazılımının Güvenilirliği ve Geçerliliği: Witty Gate Sistemi ile Karşılaştırmalı Bir Analiz

Murat KOÇ^1*, Barışcan ÖZTÜRK², Levent SANGÜN³

Corresponding author: ¹Erciyes University, Faculty of Sports Sciences, Kayseri, TÜRKİYE, muratkoc@erciyes.edu.tr  0000-0001-9103-8554
²Çukurova University, Faculty of Sports Sciences, Adana, TÜRKİYE,  bariscan.ozturk.bc@gmail.com 0000-0001-7001-3032
³Çukurova University, Adana Vocational School, Adana, TÜRKİYE, lsangun@cu.edu.tr 0000-0002-2363-8977

Doi:

https://doi.org/10.5281/zenodo.17451151

https://www.ijoss.org/Archive/issue2-volume3/ijoss-Volume2-issue3-07.pdf

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Received / Gönderim: 28.04.2025 Accepted / Kabul: 10.06.2025 Published / Yayın: 30.06.2025

Abstract

The aim of this study was to investigate the reliability and validity of Kinovea, a video motion analysis software, on rapid change of direction (COD) performance in young football players. A total of 30 amateur soccer players with a mean age of 16.67 ± 0.8 years (95%IC: 16.99–16.35), mean height of 1.75 ± 0.06 meters (95%IC: 1.78–1.73), mean body mass of 66.03 ± 7,28 kg (95% IC: 68.70–63.36), mean body mass index (BMI) of 21.33 ± 1.67 (95% IC: 21.94–20.72) and mean sports age of 6.12 ± 1.70 years (95% IC: 6.75–5.50) participated in this study. COD data were obtained using the Witty gate photocell system and a simultaneous video recording system. Data were analysed using JASP Team statistical program. Pearson correlation test was applied for the relationship between two different measurement methods, while Bland-Altman analysis was applied for the agreement of the methods. High levels of correlation (r = 0.981, p <.001) and reliability (Kinovea ICC = 0.864–0.935; Witty ICC = 0.914) were found between Witty and Kinovea systems. According to Bland-Altman analysis, a small but systematic difference was observed between the two systems (bias =-0.042 s, 95% CI: – 0.071 to- 0.014), and the Witty system measured 0.73% lower times than Kinovea. These results show that Kinovea can be a valid and reliable alternative to the Witty system.

Keywords: Change of Direction, Reliability-Validity, Kinovea.

Öz

Atıcılık Bu çalışmanın amacı, genç futbolcularda hızlı yön değiştirme (COD) performansında video hareket analiz yazılımı olan Kinovea’nın güvenilirliğini ve geçerliliğini araştırmaktı. Çalışmaya yaş ortalaması 16,67 ± 0,8 yıl (95% GA: 16,99–16,35), boy ortalaması 1,75 ± 0,06 metre (95% GA: 1,78–1,73), vücut ağırlığı ortalaması 66,03 ± 7,28 kg (95% GA: 68,70–63,36), vücut kitle indeksi (VKİ) ortalaması 21,33 ± 1,67 (95% GA: 21,94–20,72) ve spor yaşı ortalaması 6,12 ± 1,70 yıl (95% GA: 6,75–5,50) olan toplam 30 amatör futbolcu katılmıştır.

COD verileri, Witty kapı fotohücre sistemi ve eşzamanlı video kayıt sistemi kullanılarak elde edilmiştir. Veriler JASP Team istatistik programı ile analiz edilmiştir. İki farklı ölçüm yöntemi arasındaki ilişki için Pearson korelasyon testi, yöntemlerin uyumu için ise Bland-Altman analizi uygulanmıştır. Witty ve Kinovea sistemleri arasında yüksek düzeyde korelasyon (r = 0,981, p < .001) ve güvenilirlik (Kinovea ICC = 0,864–0,935; Witty ICC = 0,914) bulunmuştur. Bland-Altman analizine göre, iki sistem arasında küçük fakat sistematik bir fark gözlenmiş (bias = -0,042 sn, 95% GA: -0,071 ila -0,014), Witty sistemi Kinovea’dan %0,73 daha düşük süreler ölçmüştür.  Bu sonuçlar, Kinovea’nın Witty sistemine geçerli ve güvenilir bir alternatif olabileceğini göstermektedir.

Anahtar Kelimeler: Yön Değiştirme, Güvenilirlik-Geçerlilik, Kinovea

APA 7 Citation

Koç, M., Öztürk, B., & Sangün, L.(2023). Reliability and validity of kinovea software in assessing change of direction performance in youth soccer players: A comparative analysis with witty gate system. International Journal of Health, Exercise, and Sport Sciences, 3(2), 329–339. https://www.ijoss.org/Archive/issue2-volume3/ijoss-Volume2-issue3-07.pdf

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